6GK1411-5AB00 - SIEMENS - Product.Network

PROFIBUS with STEP 7 V13

___________________

SIMATIC

PROFIBUS

PROFIBUS with STEP 7 V13

Function Manual

12/2014

A5E03775446-AC

Preface

Documentation guide

Description

Parameter

assignment/addressing

Diagnostics

Functions

Service & Support

Siemens AG

Industry Sector

Postfach 48 48

90026 NÜRNBERG

GERMANY

A5E03775446-AC

Ⓟ 12/2014 Subject to change

Legal information

Warning notice system

This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent

damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert

symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are

graded according to the degree of danger.

DANGER

indicates that death or severe personal injury

will

result if proper precautions are not taken.

WARNING

indicates that death or severe personal injury

may

result if proper precautions are not taken.

CAUTION

indicates that minor personal injury can result if proper precautions are not taken.

NOTICE

indicates that property damage can result if proper precautions are not taken.

If more than one degree of danger is present, the warning notice representing the highest degree of danger will

be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to

property damage.

Qualified Personnel

The product/system described in this documentation may be operated only by

personnel qualified

for the specific

task in accordance with the relevant documentation, in particular its warning notices and safety instructions.

Qualified personnel are those who, based on their training and experience, are capable of identifying risks and

avoiding potential hazards when working with these products/systems.

Proper use of Siemens products

Note the following:

WARNING

Siemens products may only be used for the applications described in the catalog and in the relevant technical

documentation. If products and components from other manufacturers are used, these must be recommended

or approved by Siemens. Proper transport, storage, installation, assembly, commissioning, operation and

maintenance are required to ensure that the products operate safely and without any problems. The permissible

ambient conditions must be complied with. The information in the relevant documentation must be observed.

Trademarks

All names identified by ® are registered trademarks of Siemens AG. The remaining trademarks in this publication

may be trademarks whose use by third parties for their own purposes could violate the rights of the owner.

Disclaimer of Liability

We have reviewed the contents of this publication to ensure consistency with the hardware and software

described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the

information in this publication is reviewed regularly and any necessary corrections are included in subsequent

editions.

PROFIBUS with STEP 7 V13

Function Manual, 12/2014, A5E03775446-AC 3

Preface

Purpose of the manual

This function manual provides an overview of the PROFIBUS communication system with

SIMATIC STEP 7 V13.

STEP 7 V13 is integrated into the powerful graphic Totally Integrated Automation Portal

(TIA Portal), the new integration platform for all automation software tools.

This function manual supports you in planning a PROFIBUS system. The manual is

structured into the following subject areas:

● PROFIBUS basics

● PROFIBUS diagnostics

● PROFIBUS functions

Basic knowledge required

The following knowledge is required in order to understand the manual:

● General knowledge of automation technology

● Knowledge of the industrial automation system SIMATIC

● Knowledge about the use of Windows-based computers

● Proficiency with STEP 7

Scope

This function manual is the basic documentation for all SIMATIC products from the

PROFIBUS environment. The product documentation is based on this documentation.

The examples are based on the functionality of the S7-1500 automation system.

Changes compared to previous version

As compared to the previous version (version 07/2014), this manual contains the following

amendments/changes:

● Extension of the documentation to STEP 7 (TIA Portal) V13 SP1

● Addition of the function Intelligent DP slaves (I-slaves)

● New guide

Preface

PROFIBUS with STEP 7 V13

4 Function Manual, 12/2014, A5E03775446-AC

Conventions

STEP 7

: We refer to "STEP 7" in this documentation as a synonym for the configuration and

programming software "STEP 7 as of V12 (TIA Portal)" and subsequent versions.

This documentation contains figures of the devices described. The figures may differ slightly

from the device supplied.

You should also pay particular attention to notes such as the one shown below:

Note

A note contains important information on the product described in the documentation, on the

handling of the product or on the section of the documentation to which particular attention

should be paid.

Additional support

You will find information about available technical support in the appendix Service & Support

(Page 91).

The technical documentation for the individual SIMATIC products and systems is available

on the Internet (http://www.siemens.com/simatic-tech-doku-portal).

The online catalog and the ordering system are available on the Internet

(http://mall.industry.siemens.com).

Security information

Siemens provides products and solutions with industrial security functions that support the

secure operation of plants, solutions, machines, equipment and/or networks. They are

important components in a holistic industrial security concept. With this in mind, Siemens’

products and solutions undergo continuous development. Siemens recommends strongly

that you regularly check for product updates.

For the secure operation of Siemens products and solutions, it is necessary to take suitable

preventive action (e.g. cell protection concept) and integrate each component into a holistic,

state-of-the-art industrial security concept. Third-party products that may be in use should

also be considered. You can find more information about industrial security on the Internet

(http://www.siemens.com/industrialsecurity).

To stay informed about product updates as they occur, sign up for a product-specific

newsletter. You can find more information on the Internet

(http://support.automation.siemens.com).

PROFIBUS with STEP 7 V13

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Table of contents

Preface ................................................................................................................................................... 3

1 Documentation guide .............................................................................................................................. 7

2 Description ............................................................................................................................................ 10

2.1 Introduction to PROFIBUS ...................................................................................................... 10

2.1.1 Applications of PROFIBUS DP ............................................................................................... 11

2.1.2 PROFIBUS terminology .......................................................................................................... 12

2.1.3 PROFIBUS DP interface ......................................................................................................... 16

2.2 Structure of PROFIBUS networks .......................................................................................... 17

2.2.1 Passive network components for RS 485 networks ............................................................... 19

2.2.1.1 RS 485 cables ......................................................................................................................... 19

2.2.1.2 PROFIBUS FastConnect system ............................................................................................ 20

2.2.1.3 PROFIBUS bus connector ...................................................................................................... 22

2.2.1.4 M12 bus connector ................................................................................................................. 24

2.2.1.5 Bus terminals for RS 485 networks ........................................................................................ 24

2.2.1.6 M12 bus terminating resistor .................................................................................................. 24

2.2.2 Passive components for optical networks............................................................................... 25

2.2.2.1 Fiber-optic cables .................................................................................................................... 25

2.2.2.2 Plastic and PCF fiber-optic cables .......................................................................................... 26

2.2.2.3 Glass fiber-optic cables........................................................................................................... 27

2.2.3 Active network components .................................................................................................... 29

2.2.3.1 Network components in electrical networks............................................................................ 29

2.2.3.2 Network components in optical networks ............................................................................... 33

2.2.4 Examples for topology ............................................................................................................ 35

2.2.4.1 Topology with RS485 repeater ............................................................................................... 35

2.2.4.2 Topology with diagnostic repeater .......................................................................................... 37

2.2.4.3 OLM topology .......................................................................................................................... 40

2.2.4.4 WLAN topology ....................................................................................................................... 40

2.2.4.5 Connecting PROFIBUS to PROFINET ................................................................................... 41

3 Parameter assignment/addressing ........................................................................................................ 42

3.1 Assigning the DP slave to a DP master .................................................................................. 43

3.2 PROFIBUS address ................................................................................................................ 45

3.3 Network settings ..................................................................................................................... 46

3.4 Cable configuration ................................................................................................................. 49

3.5 Additional network stations ..................................................................................................... 51

3.6 Bus parameters ....................................................................................................................... 52

3.7 Constant bus cycle time .......................................................................................................... 55

Table of contents

PROFIBUS with STEP 7 V13

6 Function Manual, 12/2014, A5E03775446-AC

4 Diagnostics ........................................................................................................................................... 57

4.1 Overview ................................................................................................................................ 57

4.2 Diagnostics using the display of the S7-1500 ........................................................................ 58

4.3 Diagnostics with the diagnostic repeater ............................................................................... 60

4.4 I&M data (Identification and Maintenance) ............................................................................ 61

5 Functions .............................................................................................................................................. 62

5.1 Isochronous mode ................................................................................................................. 62

5.1.1 What is isochronous mode? ................................................................................................... 62

5.1.2 Use of isochronous mode ...................................................................................................... 63

5.1.3 Isochronous applications ....................................................................................................... 64

5.1.4 Sequence of synchronization ................................................................................................. 65

5.1.5 Requirements for configuration .............................................................................................. 66

5.1.6 Configuring isochronous mode .............................................................................................. 67

5.1.7 Diagnostics and interrupt functions ........................................................................................ 70

5.1.8 Parameter settings for isochronous mode ............................................................................. 71

5.1.8.1 Viewing isochronous mode parameters ................................................................................. 71

5.1.8.2 Change parameters ............................................................................................................... 72

5.2 Acyclical data exchange ........................................................................................................ 74

5.3 SYNC/FREEZE groups .......................................................................................................... 75

5.4 Interrupts ................................................................................................................................ 77

5.5 Intelligent DP slaves (I-slaves) ............................................................................................... 78

5.5.1 I-slave functionality ................................................................................................................ 78

5.5.2 Data exchange with higher-level DP master .......................................................................... 81

5.5.3 Configuring an I-slave ............................................................................................................ 82

5.5.4 Configuring transfer areas ..................................................................................................... 84

5.5.5 Sample program..................................................................................................................... 85

5.5.6 Diagnostics and interrupt behavior ........................................................................................ 89

A Service & Support ................................................................................................................................. 91

Glossary ............................................................................................................................................... 94

Index .................................................................................................................................................... 99

PROFIBUS with STEP 7 V13

Function Manual, 12/2014, A5E03775446-AC 7

Documentation guide

The documentation for the SIMATIC S7-1500 automation system and the SIMATIC

ET 200MP, ET 200SP and ET 200AL distributed I/O systems is divided into three areas.

This division allows you easier access to the specific information you require.

Basic information

System manuals and Getting Started describe in detail the configuration, installation, wiring

and commissioning of the SIMATIC S7-1500, ET 200MP, ET 200SP and ET 200AL systems.

The STEP 7 online help supports you in the configuration and programming.

Device information

Product manuals contain a compact description of the module-specific information, such as

properties, terminal diagrams, characteristics and technical specifications.

General information

The function manuals contain detailed descriptions on general topics such as diagnostics,

communication, Motion Control, Web server.

You can download the documentation free of charge from the Internet

(http://w3.siemens.com/mcms/industrial-automation-systems-simatic/en/manual-

overview/Pages/Default.aspx).

Changes and additions to the manuals are documented in product information sheets.

Documentation guide

PROFIBUS with STEP 7 V13

8 Function Manual, 12/2014, A5E03775446-AC

Manual Collections

The Manual Collections contain the complete documentation of the systems put together in

one file.

You will find the Manual Collections on the Internet:

● S7-1500/ET 200MP (http://support.automation.siemens.com/WW/view/en/86140384)

● ET 200SP (http://support.automation.siemens.com/WW/view/en/84133942)

● ET 200AL (http://support.automation.siemens.com/WW/view/en/95242965)

My Documentation Manager

The My Documentation Manager is used to combine entire manuals or only parts of these to

your own manual.

You can export the manual as PDF file or in a format that can be edited later.

You can find the My Documentation Manager on the Internet

(http://support.automation.siemens.com/WW/view/en/38715968).

Applications & Tools

Applications & Tools supports you with various tools and examples for solving your

automation tasks. Solutions are shown in interplay with multiple components in the system -

separated from the focus in individual products.

You can find Applications & Tools on the Internet

(http://support.automation.siemens.com/WW/view/en/20208582).

CAx Download Manager

The CAx Download Manager is used to access the current product data for your CAx or CAe

systems.

You configure your own download package with a few clicks.

In doing so you can select:

● Product images, 2D dimension drawings, 3D models, internal circuit diagrams, EPLAN

macro files

● Manuals, characteristics, operating manuals, certificates

● Product master data

You can find the CAx Download Manager on the Internet

(http://support.automation.siemens.com/WW/view/en/42455541).

Documentation guide

PROFIBUS with STEP 7 V13

Function Manual, 12/2014, A5E03775446-AC 9

TIA Selection Tool

With the TIA Selection Tool, you can select, configure and order devices for Totally

Integrated Automation (TIA).

This tool is the successor of the SIMATIC Selection Tool and combines the known

configurators for automation technology into one tool.

With the TIA Selection Tool, you can generate a complete order list from your product

selection or product configuration.

You can find the TIA Selection Tool on the Internet

(http://w3.siemens.com/mcms/topics/en/simatic/tia-selection-tool).

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Description

2.1

Introduction to PROFIBUS

What is PROFIBUS?

PROFIBUS is a bus system that networks automation systems and field devices that are

compatible with PROFIBUS. As communication medium for the field level, PROFIBUS is an

important part of Totally Integrated Automation (TIA).

The different communication networks can be used independent of one another or they can

be combined with each other.

PROFIBUS protocols

PROFIBUS DP

(distributed I/O) is a communication network for the field level according to

IEC 61158-2 / EN 61158-2 with the hybrid access protocols token bus and master-slave. The

networking takes place by means of two-wire lines or fiber-optic cables. Data transmission

rates of 9.6 kbps to 12 Mbps are possible.

PROFIBUS PA

is the PROFIBUS for process automation (PA). It connects the

PROFIBUS DP communication protocol with the MBP (Manchester Bus Powered)

transmission technology to IEC 61158-2.

PROFIBUS PA networks can be designed based on shielded, twisted two-wire lines

intrinsically safe and are therefore suitable for hazardous areas (Ex zones 0 and 1). The data

transmission rate is 31.25 kbps.

Description

2.1 Introduction to PROFIBUS

PROFIBUS with STEP 7 V13

Function Manual, 12/2014, A5E03775446-AC 11

2.1.1

Applications of PROFIBUS DP

Introduction

The efficiency of control systems is not determined by automation devices alone, but

depends to a large extent on the overall configuration of an automation solution. This

includes a powerful communication system in addition to plant visualization and operator

control and monitoring.

The STEP 7 engineering tool supports you during the engineering and configuration of an

automation solution.

Applications of PROFIBUS DP

The PROFIBUS network offers wireless connection of several controllers, components and

subnets as electrical network, optical network or by using links. Sensors and actuators are

controlled centrally by means of PROFIBUS DP.

The following figure shows connection options to PROFIBUS DP:

Figure 2-1 Connection options to PROFIBUS DP

Description

2.1 Introduction to PROFIBUS

PROFIBUS with STEP 7 V13

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Objectives of PROFIBUS DP

Distributed automation systems are increasingly used in production and process automation.

This means a complex control task is divided up into smaller, more transparent subtasks with

distributed control systems. This creates a high demand for communication between the

distributed systems.

Distributed systems offer the following benefits:

● Independent and simultaneous commissioning of individual devices is possible

● Small, manageable programs

● Parallel processing due to distributed automation systems

● Reduced response times

● Higher-level structures can take on additional diagnostics and logging functions.

● Increased plant availability because the rest of the overall system can continue to work

when a subordinate station fails.

2.1.2

PROFIBUS terminology

Definition: Devices in the PROFIBUS environment

In the PROFIBUS environment, "device" is the generic term for:

● Automation systems (for example, PLC, PC)

● Distributed I/O systems

● Field devices (for example, hydraulic devices, pneumatic devices)

● Active network components (e.g., diagnostic repeater, optical link module)

● Gateways to AS interface or other fieldbus systems

Description

2.1 Introduction to PROFIBUS

PROFIBUS with STEP 7 V13

Function Manual, 12/2014, A5E03775446-AC 13

Devices with PROFIBUS DP

The figure below shows the most important components with PROFIBUS DP. The table

below lists the designations of the individual components.

Number

PROFIBUS

Note

①

DP master system

②

DP master Device used to address the connected DP slaves. The DP master

exchanges input and output signals with field devices.

The DP master is often the controller on which the automation

program runs.

③

PG/PC PG/PC/HMI device for commissioning and diagnostics

DP master of class 2

④

PROFIBUS

Network infrastructure

⑤

HMI

Device for operating and monitoring functions

⑥

DP slave Distributed field device assigned to the DP master, e.g., valve

terminals, frequency converters.

⑦

I-slave

Intelligent DP slave

Figure 2-2 Devices with PROFIBUS

Description

2.1 Introduction to PROFIBUS

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Overview of I/O communication

I/O communication is the reading or writing of inputs/outputs of the distributed I/O. The figure

below gives you an overview of I/O communication using PROFIBUS DP:

Figure 2-3 I/O communication using PROFIBUS DP

I/O communication is also available with the communication module (CM) or the interface

module (IM) with integrated DP interface. These DP interfaces behave like integrated DP

interfaces of the CPU.

Description

2.1 Introduction to PROFIBUS

PROFIBUS with STEP 7 V13

Function Manual, 12/2014, A5E03775446-AC 15

I/O communication using PROFIBUS DP

Table 2- 1 I/O communication using PROFIBUS DP

Communication between …

Explanation

DP master and DP slave The data exchange between a DP master and DP slaves with I/O modules takes place as

follows: The DP master queries the DP slaves of its master system one after the other,

receives input values from the DP slaves, and transmits output data to the DP slaves

(master-slave principle).

DP master and I-slave A fixed amount of data is transmitted cyclically between the user programs in CPUs of DP

masters and I-slaves.

The DP master does not access the I/O modules of the I-slave, but instead accesses

configured address areas, called transfer areas, that can be inside or outside the process

image of the I-slave CPU. If parts of the process image are used as transfer areas, these

may not be used for actual I/O modules.

Data transmission takes place with load and transfer operations using the process image or

by direct access.

DP master and DP master A fixed amount of data is transmitted cyclically between the user programs in CPUs of DP

masters. A DP/DP coupler is required as additional hardware.

The DP masters mutually access configured address areas, called transfer areas, inside or

outside the process image of the CPUs. If parts of the process image are used as transfer

areas, these may not be used for actual I/O modules.

Data transmission takes place with load and transfer operations using the process image or

by direct access.

Additional information

You can find additional information on the hardware configuration in the STEP 7 online help.

Description

2.1 Introduction to PROFIBUS

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2.1.3

PROFIBUS DP interface

Properties

A PROFIBUS device has at least one PROFIBUS interface with an electrical (RS 485)

interface or optical (Polymer Optical Fiber, POF) interface.

Table 2- 2 Properties of the PROFIBUS DP interface

Standard PROFIBUS: IEC 61158/61784

Physical bus/media PROFIBUS cables (twisted two-wire lines RS 485 or

fiber-optic cables)

Transmission rate 9.6 kbps to 12 Mbps

Representation of the PROFIBUS DP interface in STEP 7

In the device view of STEP 7, the PROFIBUS DP interfaces for a DP master and a DP slave

are highlighted by a purple rectangle:

Figure 2-4 PROFIBUS DP interfaces

Description

2.2 Structure of PROFIBUS networks

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2.2

Structure of PROFIBUS networks

Contents of this chapter

The following chapter provides background information on building your communication

network.

● Overview of the most important passive network components: These are network

components that forward a signal without the possibility of actively influencing it, for

example, cables, connectors.

● Overview of the most important active network components: These are network

components that actively affect a signal, for example, repeaters, diagnostic repeaters.

● Overview of the most common network structures (topologies)

Physical connections of industrial networks

PROFIBUS devices can be networked in industrial plants in two different physical ways:

● By means of electrical signals via copper cables

● By means of optical signals via fiber-optic cables

Description

2.2 Structure of PROFIBUS networks

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Selection criteria for networking

The table below includes selection criteria for electrical and optical networking of PROFIBUS

devices:

Table 2- 3 Selection criteria for electrical and optical networking

Criteria

Electrical

PROFIBUS

Optical network

with OLM

Optical network

with OBT

Transmission

medium

Shielded two-wire

line

● – –

POF – ● ●

PCF – ● ●

Glass – ● –

Distances

Max. network span PROFIBUS DP:

9.6 km

PROFIBUS PA:

1.9 km

90 km 9.6 km

Between two devices up to 1 km 1) up to 15 km 2) up to 300 m 2)

Topology

Bus ● – –

Linear – ● ●

Tree ● ● ●

Ring – ● ●

Transmission

protocols

DP, PA DP, PA DP

Connection of

devices by means

OLM – ● –

Integrated interfaces ● – ●

Bus terminal ● – ●

Bus connector ● – –

Electrical network

segments can be

connected

● ● –

● Suitable

– Not relevant for this application

1) Depending on data rate and type of service used

2) Depending on cable type used

Installation guideline for PROFIBUS networks

A PROFIBUS segment must be terminated at the start and end; passively with a connector

or actively with a bus terminating resistor.

The same principles apply to the installation of a PROFIBUS network as described in the

SIMATIC NET PROFIBUS networks

(http://support.automation.siemens.com/WW/view/en/35222591) manual.

Description

2.2 Structure of PROFIBUS networks

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2.2.1

Passive network components for RS 485 networks

2.2.1.1

RS 485 cables

Introduction

The following applies to all RS 485 cables for PROFIBUS from Siemens:

● Their double shielding makes them especially suited for laying in industrial environments

with electromagnetic interference.

● A continuous grounding concept can be implemented by means of the outer shield of the

bus cable and the ground terminals of the bus terminals.

● The imprinted meter marking makes it easier to determine the length (accuracy ±5%).

RS 485 cables for PROFIBUS

SIMATIC NET PROFIBUS cables are available in different versions which allow optimum

adaptation to different areas of application:

● FC Standard Cable GP (bus cable for fixed laying inside buildings)

● FC Standard Cable IS GP (bus cable for hazardous area)

● FC-FRNC Cable GP (bus cable with halogen-free protective jacket for use inside

buildings)

● FC Food Cable (bus cable with PE jacket for use in the food and beverage industry)

● FC Robust Cable (bus cable with PUR jacket for environments subject to chemical and

mechanical stress)

● FC Ground Cable (ground cable with PE jacket)

● PROFIBUS FC Trailing Cable (trailing cable for tow chains)

● PROFIBUS Festoon Cable (bus cable for festoon mounting)

● PROFIBUS Torsion Cable (torsion-free bus cable for networking movable plant parts, for

example, robots)

● PROFIBUS FC Flexible Cable (bus cable for machine parts that are moved infrequently

or cabinet doors)

● SIENOPYR-FR ship cable (for permanent laying on ships and off-shore units in all rooms

and on open deck)

● PROFIBUS Hybrid Standard Cable (hybrid cable with 2 power wires (1.5 mm2) for data

and power supply of the ET 200pro)

● PROFIBUS Hybrid Robust Cable (trailable hybrid cable with 2 power wires (1.5 mm2) for

data and power supply of the ET 200pro)

Description

2.2 Structure of PROFIBUS networks

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Maximum cable lengths

When using copper cables, the maximum size of a PROFIBUS segment depends on the

transmission rate.

If these lengths are not sufficient for your application, you can expand the network by using

repeaters. You can achieve a maximum size by cascading up to nine repeaters.

Table 2- 4 Maximum cable lengths

Transmission rate

Maximum cable length of a bus

segment

Maximum distance between two

stations

9.6 to 187.5 kbps 1000 m 10000 m

500 kbps 400 m 4000 m

1.5 Mbps 200 m 2000 m

3 to 12 Mbps 100 m 1000 m

2.2.1.2

PROFIBUS FastConnect system

PROFIBUS FastConnect (FC)

PROFIBUS FastConnect is a system for fast and easy fabrication of PROFIBUS copper

cables.

The system consists of three components:

● FastConnect bus cables for quick mounting

● FastConnect stripping tool

● FastConnect bus connector for PROFIBUS with insulation displacement method

FastConnect bus cables and stripping tool

The special design of the FastConnect bus cables allows for the use of the FastConnect

stripping tool to accurately strip away the protective jacket and the braided shield in one

step. The connection of the prepared cables takes place in the FastConnect bus connectors

using the insulation displacement method.

All PROFIBUS FastConnect bus cables can also be connected to the conventional bus

connectors with screw-type terminals.

Description

2.2 Structure of PROFIBUS networks

PROFIBUS with STEP 7 V13

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Area of application

You need FastConnect bus connectors for PROFIBUS for the following applications:

● Connect devices with an electrical 9-pin D-Sub interface to IEC 61158-2 directly with

SIMATIC NET PROFIBUS cables.

● Connect electrical segments or individual devices to the Optical Link Module (OLM) and

Optical Bus Terminal (OBT).

● Connect devices or programming devices to the repeater.

Versions

The FastConnect bus connector in degree of protection IP20 is available in the following

versions:

● with integrated terminating resistor and isolating function

● with or without PG socket

● with a cable outlet of 35°, 90° or 180°

● with device category 3G suitable for zone 2 hazardous area

Figure 2-5 Example for PROFIBUS FastConnect bus connector with PG socket, cable outlet 90°

Description

2.2 Structure of PROFIBUS networks

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Additional information

For additional information on the available components visit the Siemens Mall

(http://mall.industry.siemens.com).

2.2.1.3

PROFIBUS bus connector

Area of application

You need PROFIBUS bus connectors for the following applications:

● Connect devices with a 9-pin D-Sub interface to IEC 61158-2 directly with the

SIMATIC NET PROFIBUS cables.

● Connect electrical segments or individual devices to the Optical Link Module (OLM) and

Optical Bus Terminal (OBT).

● Connect devices or programming devices to the repeater.

Description

2.2 Structure of PROFIBUS networks

PROFIBUS with STEP 7 V13

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Versions

The PROFIBUS bus connector in degree of protection IP20 is available in the following

versions:

● with integrated terminating resistor and isolating function

● with or without PG socket

● with a cable outlet of 35°, 90° or 180°

● with device category 3G suitable for zone 2 hazardous area

Figure 2-6 Example for PROFIBUS bus connector with PG socket, cable outlet 35°

Additional information

For additional information on the available components visit the Siemens Mall

(http://mall.industry.siemens.com).

Description

2.2 Structure of PROFIBUS networks

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2.2.1.4

M12 bus connector

Area of application

Devices with an electrical M12 interface can use the M12 bus connector for SIMATIC NET

PROFIBUS for direct connection with the SIMATIC NET PROFIBUS cables.

The M12 bus connector in degree of protection IP65 is available in the following versions:

● with screw-type terminals

● with insulation displacement termination

● with a cable outlet of 180°

2.2.1.5

Bus terminals for RS 485 networks

Bus terminal RS 485 and bus terminal M12

A bus terminal is used for the connection of an individual PROFIBUS station with RS485

interface to the PROFIBUS bus cable.

Bus terminals in degree of protection IP20 are available in the following versions:

● Bus terminal RS 485 with or without PG interface, transmission rate 9.6 kbps to 1.5 Mbps,

integrated terminating resistor combination (connectible), with 1.5 m and 3 m connecting

cable

● Bus terminal M12, transmission rate 9.6 kbps to 12 Mbps, integrated terminating resistor

combination with isolating function, with 1.5 m connecting cable

2.2.1.6

M12 bus terminating resistor

Terminating segment with terminating resistor

If there is a station with M12 connection system at the beginning or end of a PROFIBUS

segment, you need an M12 bus terminating resistor.

The M12 PROFIBUS connection of a device consists of an M12 socket for the infeed and an

M12 male connector to loop-through the bus signal.

This means you need one bus terminating resistor with male contacts (6GK1905-0EC00)

and with female contacts (6GK1905-0ED00) for each M12 bus cable.

Description

2.2 Structure of PROFIBUS networks

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2.2.2

Passive components for optical networks

2.2.2.1

Fiber-optic cables

Types of fiber-optic cables

Data transmission with fiber-optic cables takes place through modulation of electromagnetic

waves in the range of visible and invisible light. These cables are made of high-quality plastic

fibers and glass fibers:

● Plastic and PCF fiber-optic cables (Page 26)

● Glass fiber-optic cables (Page 27)

The different types of fiber-optic cables provide solutions matched to the operating and

environmental conditions for the connection of components with each other.

Benefits

Fiber-optic cables offer the following benefits when compared with electrical cables:

● Galvanic isolation of the devices and segments

● No potential equalization currents

● No impact on transmission path through external electromagnetic interference

● No lightning protection elements required

● No noise radiation along the transmission route

● Low weight

● Depending on the type of fiber you can implement cable lengths up to few kilometers at

even higher transmission rates.

● No dependency of the maximum permitted distances on the transmission rate

Additional information

Additional information of the properties and technical specifications of the passive

components and connectors for fiber-optic cables is available in the PROFIBUS network

manual (http://support.automation.siemens.com/WW/view/en/35222591).

Description

2.2 Structure of PROFIBUS networks

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2.2.2.2

Plastic and PCF fiber-optic cables

Plastic (POF) and PCF fiber-optic cables are used for the connection of Optical Link modules

with connections for plastic fiber-optic cables (OLM/P), Optical Bus Terminal (OBT) and

devices with integrated optical interfaces. Under certain conditions, they are an inexpensive

alternative to conventional glass fiber-optic cables.

Plastic Fiber Optic duplex core

The plastic fiber-optic duplex core is a flat dual core with PVC inner jacket without protective

jacket. The cable can be easily assembled on-site.

The cable is intended for indoor applications with low mechanical loads or inside cabinets.

For OLM connections and with integrated optical interfaces you cover a length of up to 50 m

between two devices with this cable.

Plastic Fiber Optic standard cable

The plastic fiber optic standard cable consists of two plastic fibers with robust polyamide

inner jacket surrounded by Kevlar tensile elements and a purple PVC protective jacket. The

cable can be easily assembled on-site.

The robust round cable is suited for indoor applications. The maximum distance that can be

covered is 80 m for OLM/P connections and 50 m with integrated optical interfaces and OBT.

PCF Standard Cable

The pre-assembled PCF Standard Cable consists of two PCF fibers surrounded by Kevlar

tensile elements and a purple PVC protective jacket. It is always supplied with a pulling aid

installed on one end to pull in the cable channels.

The robust round cable is suited for indoor applications with cable lengths up to 400 m

(OLM) or 300 m (integrated optical interfaces, OBT) between two devices.

PCF Standard Cable GP

The PCF Standard Cable GP consists of two PCF fibers surrounded by Aramid tensile

elements and a green PVC protective jacket. The cable is pre-assembled and can be

ordered by the meter. It is supplied with a pulling aid installed on one end to pull in the cable

channels.

The robust round cable is suited for indoor and outdoor applications with cable lengths up to

400 m (OLM) or 300 m (integrated optical interfaces, OBT) between two devices.

Description

2.2 Structure of PROFIBUS networks

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PCF Trailing Cable

The PCF Trailing Cable consists of two PCF fibers surrounded by Aramid tensile elements

and a green PUR protective jacket. The cable is pre-assembled and can be ordered by the

meter. It is supplied with a pulling aid installed on one end to pull in the cable channels.

The robust round cable is suited for moving indoor and outdoor applications with cable

lengths up to 400 m (OLM) or 300 m (integrated optical interfaces, OBT) between two

devices.

PCF Trailing Cable GP

The PCF Trailing Cable GP consists of two PCF fibers surrounded by Aramid tensile

elements and a green PVC protective jacket. The cable is pre-assembled and can be

ordered by the meter. It is supplied with a pulling aid installed on one end to pull in the cable

channels.

The robust round cable is suited for moving indoor and outdoor applications with cable

lengths up to 400 m (OLM) or 300 m (integrated optical interfaces, OBT) between two

devices.

2.2.2.3

Glass fiber-optic cables

Glass fiber-optic cables are suitable for connection of optical interfaces that work in the

wavelength range around 850 nm and around 1300 nm. They include two graded-index

multimode fibers of the type 62.5/125 μm.

The glass fiber-optic cables are available in different versions which makes for an optimum

adaptation to different areas of application:

● Fiber Optic standard cable

● INDOOR Fiber Optic indoor cable

● Flexible Fiber Optic trailing cable

Fiber Optic standard cable

The standard cable is the universal cable for indoor and outdoor use.

INDOOR Fiber Optic indoor cable

The indoor cable is intended for weather-proof indoor use. It is halogen-free, non-crush and

flame-retardant.

Description

2.2 Structure of PROFIBUS networks

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Flexible Fiber Optic trailing cable

The trailing cable was designed for the special application of forced movement, for example,

for constantly moved machine parts such as trailing chains. It is mechanically designed for

100,000 bending cycles by ±90° (with the specified minimum radius). Integrated dummy

elements ensure a round cross-section of the cable. The trailing cable can be used indoors

and outdoors.

Maximum distances between two optical link modules

The following distances may not be exceeded between two OLMs regardless of the optical

power budget:

● OLM/P11, OLM/P12: 400 m

● OLM/G11, OLM/G12, OLM/G12-EEC: 3 km

● OLM/G11-1300, OLM/G12-1300: 15 km

Additional information

All operating instructions

(http://support.automation.siemens.com/WW/view/en/10805951/133300) of the

SIMATIC NET bus components include information on distances that can be covered with

the SIMATIC NET glass fiber-optic cables. You can configure your optical network without

any calculations using simple limits.

Description

2.2 Structure of PROFIBUS networks

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2.2.3

Active network components

2.2.3.1

Network components in electrical networks

Active network components

The following active network components are available for PROFIBUS in electrical networks:

● Repeater RS485

● Diagnostics repeater

● PROFIBUS Terminator

● DP/DP coupler

● IE/PB Link PN IO

● IWLAN/PB Link PN IO

● Active components for the connection of CAN

● Active components for the gateway between PROFIBUS and AS-Interface

– DP/AS-i LINK Advanced

– DP/AS-Interface Link 20E

– DP/AS-i F-Link

RS485 repeater

The RS485 IP20 repeater connects two PROFIBUS bus segments in RS485 technology with

up to 32 devices. It provides transmission rates from 9.6 kbps to 12 Mbps.

The RS485 repeater refreshes a signal regarding amplitude, signal width and edge

steepness between two segments. It is used when more than 32 stations are connected to

the bus or the maximum cable length of a segment is exceeded.

Bus segments can be operated ungrounded (galvanic isolation of segments) with an RS485

repeater.

Diagnostics repeater

The diagnostic repeater connects three PROFIBUS segments in RS485 technology, two of

which are diagnostics-capable segments with 31 devices each. It is designed as DP slave to

send diagnostics alarms to the DP master.

The diagnostic function provides the location and the cause of cable faults, such as wire

break or missing terminating resistors. The fault location is indicated relative to the existing

devices.

The diagnostics repeater refreshes a signal regarding amplitude, signal width and edge

steepness between the segments. The cascading depth between any two PROFIBUS

devices is limited to nine diagnostics repeaters.

Description

2.2 Structure of PROFIBUS networks

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PROFIBUS Terminator

The PROFIBUS Terminator forms an active bus termination. Bus devices can be switched

off, removed or replaced without affecting data transmission. This is particularly true for bus

devices on both ends of the bus cable at which terminating resistors must be connected or

supplied. The PROFIBUS Terminator can be mounted on a standard mounting rail.

IE/PB Link PN for the connection of a PROFIBUS segment to an Industrial Ethernet network

The IE/PB Link PN IO as independent component provides the seamless transition between

Industrial Ethernet and PROFIBUS. Through the use of IE/PB Link PN IO as substitute on

the Ethernet, the existing PROFIBUS devices can continue to be used and can be integrated

into a PROFINET application.

A PROFINET IO controller is required for this configuration. The IE/PB Link PN acts as

master on the PROFIBUS end.

IWLAN/PB Link PN IO as gateway between LAN and PROFIBUS

PROFIBUS devices can be coupled to PROFINET IO by means of IWLAN/PB Link PN IO.

This means you can integrate existing PROFIBUS configurations into PROFINET.

The IWLAN/PB Link PN IO supports the use of IWLAN and WLAN antennas for wireless

data transmission, for example, in suspended monorail systems or conveyor systems.

Because of the PROFINET support, the numerous PROFIBUS system services, for

example, diagnostics by bus, can continue to be used.

A PROFINET IO controller is required for this configuration. The IWLAN/PB Link PN IO acts

as master on the PROFIBUS end.

CANopen module for connection to CAN

You can use the CANopen module to easily connect CANopen applications to PROFIBUS.

Typical areas of application:

● Control of hydraulic valves/hydraulic axes in vehicles

● Control of motors in packaging machines and on conveyor belts

● Use in wind turbines for detection of angular encoders

● Detection of HMI devices on machines, e.g., joysticks

● Detection of measured data from displacement transducers, inclination sensors or angle

encoders on tower cranes or gantry cranes

DP/DP coupler for connection of two PROFIBUS networks

The PROFIBUS DP/DP coupler is used to connect two PROFIBUS DP networks. Data

(0 to 244 bytes) is transmitted from the DP master of the first network to the DP master of

another network and vice versa.

The DP/DP coupler comes equipped with two independent DP interfaces that establish the

connection to the two DP networks. There is one slave at each DP network. The data

exchange between the two DP networks takes place by internal copying in the coupler.

Description

2.2 Structure of PROFIBUS networks

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DP/PA bus link for connection of PROFIBUS PA

The DP/PA bus link is the connection between PROFIBUS DP and PROFIBUS PA. This

means it connects the process control systems with the field devices of the process

automation.

The following components are available for a DP/PA bus link:

● DP/PA coupler Ex [ia]

● DP/PA coupler FDC 157-0

● Interface module IM 153-2 for establishing a DP/PA link.

● Active field distributor AFDiS for hazardous areas

Active components for the gateway between PROFIBUS and AS-Interface

●

DP/AS-i LINK Advanced

The

DP/AS-i LINK Advanced

is PROFIBUS DPV1 slave (according to

IEC 61158-2/EN 61158-2) and AS-Interface master (according to AS-Interface

specification V3.0 according to EN 50295) and provides transparent data access to

AS-Interface from PROFIBUS DP.

PROFIBUS DP masters can cyclically exchange I/O data with the AS-Interface;

DP masters with acyclic services can also make AS-Interface master calls. The

DP/AS-i

LINK Advanced

is particularly suited for distributed configurations and for the connection

of a subordinate AS-Interface network.

The DP/AS-i LINK Advanced in the version as AS-Interface single master is completely

sufficient for applications with typical configuration limits.

For applications with high configuration limits, the DP/AS-i LINK Advanced is used as

AS-Interface double master. In this case, the duplicate configuration limits can be used

on two independently running AS-Interface strands.

●

DP/AS-Interface Link 20E:

The DP/AS-Interface Link 20E is PROFIBUS DP slave (in accordance with EN 61158)

and AS-Interface master (in accordance with AS-Interface specification V3.0 according to

EN 50295) and supports operation of the AS-Interface on PROFIBUS DP.

Single PROFIBUS masters can cyclically exchange I/O data with the AS-Interface;

masters with acyclic services can exchange I/O data and make master calls.

●

DP/AS-i F-Link:

The DP/AS-i F-Link is PROFIBUS DP-V1 slave (according to EN 61158) and AS-i master

(according to AS-Interface specification V3.0 to EN 50295) and provides transparent data

access to AS-Interface from PROFIBUS DP. The DP/AS-i F-Link is also the only AS-i

master that can forward safety-oriented input data of ASIsafe slaves to a fail-safe CPU

with PROFIBUS DP master by means of the PROFIsafe protocol. Additional safety

cabling or monitoring is not required (in particular, no AS-Interface safety monitor).

Depending on the slave type, you can transmit binary values or analog values. All slaves

according to AS-Interface specification V2.0, V2.1 or V3.0 can be operated as AS-i

slaves.

As fully-featured AS-i master according to specification V3.0, you can use higher

configuration limits on the AS-i network (496 inputs and outputs each, up to 62 digital or

analog slaves).

Description

2.2 Structure of PROFIBUS networks

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Additional information

Information on the components is available in the Siemens Mall

(http://mall.industry.siemens.com).

Additional information is available in these manuals:

● PROFIBUS Network Manual

(http://support.automation.siemens.com/WW/view/en/35222591)

● Diagnostic repeater (http://support.automation.siemens.com/WW/view/en/7915183)

● DP/DP Coupler (http://support.automation.siemens.com/WW/view/en/1179382)

● SIMATIC NET Twisted-Pair and Fiber-Optic Networks

(http://support.automation.siemens.com/WW/view/en/8763736)

● Basics on Setting up an Industrial Wireless LAN

(http://support.automation.siemens.com/WW/view/en/9975764)

● SIMATIC bus links, DP/PA coupler, active field distributors, DP/PA Link and Y Link

(http://support.automation.siemens.com/WW/view/en/1142696)

● Information on the CANopen module is available on the Internet

(http://www.hms-networks.com/can-for-et200s).

● DP/AS-interface LINK Advanced

(http://support.automation.siemens.com/WW/view/en/22502958/133300) manual

● DP/AS-i F-Link (http://support.automation.siemens.com/WW/view/en/24196041) manual

See also

Configuring isochronous mode (Page 67)

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Diagnostics

4.1

Overview

Diagnostics options

In case of an error you can determine the current status of your automation system and react

specifically by using the event-related diagnostics and the evaluation of interrupts.

You can use the following options for diagnostics of the PROFIBUS components:

● Determine the status of the system using the Lifelist in STEP 7.

● Evaluate the module status, error and message texts by using the display of the S7-1500

CPU.

● Run cable diagnostics during operation by means of the diagnostics repeater.

● Evaluate the diagnostics and interrupt behavior in isochronous mode. (Page 70)

● Determine status information for fault localization and fault rectification by using the

DP/PA coupler FDC 157-0 configured as PROFIBUS diagnostics slave.

Additional information

Additional information on diagnostics is available in these manuals:

● In the Diagnostics repeater for PROFIBUS-DP

(http://support.automation.siemens.com/WW/view/en/7915183) manual for diagnostics

with STEP 7, diagnostics in the user program, monitoring function isochronous

PROFIBUS, topology display in STEP 7.

● In the Diagnostics (http://support.automation.siemens.com/WW/view/en/59192926)

function manual for diagnostics options that are available for the SIMATIC systems

S7-1500, ET 200MP, ET 200SP and ET 200AL.

● In the PROFIBUS Network Manual

(http://support.automation.siemens.com/WW/view/en/35222591) system manual for

diagnostics of fiber-optic cables.

● In the DP/PA Coupler, Active Field Distributors, DP/PA Link and Y Link

(http://support.automation.siemens.com/WW/view/en/1142696) operating instructions.

● In the Web Server (http://support.automation.siemens.com/WW/view/en/59193560)

function manual for diagnostics options (based on the functionality of the CPU).

Diagnostics

4.2 Diagnostics using the display of the S7-1500

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4.2

Diagnostics using the display of the S7-1500

Displays

Each CPU in the S7-1500 automation system has a front cover with a display and operating

buttons. Control and status information is displayed in different menus on the display. You

use the operating buttons to navigate through the menus.

The following states can be evaluated on the display:

● Module status for central and distributed modules

● Error and alarm texts (system diagnostics, user-defined alarms)

Module status

From the station overview you go to the module status for a distributed module via the

module overview.

Figure 4-1 Example: Station overview, module overview, module status

Diagnostics

4.2 Diagnostics using the display of the S7-1500

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Error and alarm texts

Figure 4-2 Example: Diagnostic buffer, alarms

Additional information

Additional information on the topic "Functions and operation of the display" is available in the

documentation for the S7-1500 automation system on the Internet

(http://support.automation.siemens.com/WW/view/en/59191792).

Diagnostics

4.3 Diagnostics with the diagnostic repeater

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4.3

Diagnostics with the diagnostic repeater

Introduction

The diagnostic repeater is a repeater that can monitor two segments of a RS485-PROFIBUS

subnet (copper cable) during operation and signal cable faults to the DP master by sending a

diagnostic frame. Fault location and the cause of the fault can be displayed in plain text by

means of STEP 7 as well as operator control and monitoring devices (SIMATIC HMI).

With its cable diagnostics during operation, the diagnostic repeater allows you to detect and

localize cable faults early on. This means plant faults are detected early and plant downtimes

can be prevented.

Diagnostic functions

● The diagnostic function provides the location and the cause of cable faults, such as wire

break or missing terminating resistors. The fault location is specified relative to the

devices present, for example "Break on signal line A and/or B".

● Reading out the saved diagnostic and statistical information.

● Monitoring of the isochronous PROFIBUS, e.g., violation of cycle time.

● Providing identification data.

Additional information

Additional information on diagnostics with STEP 7 and for reading out the diagnostics with

the user program is available in the Diagnostic repeater for PROFIBUS DP

(http://support.automation.siemens.com/WW/view/en/7915183) manual.

Diagnostics

4.4 I&M data (Identification and Maintenance)

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4.4

I&M data (Identification and Maintenance)

Definition and properties

Identification and maintenance data (I&M) is information saved in a module to provide

support when:

● Checking the plant configuration

● Locating hardware changes in a plant

Identification data (I data) is module information (some of which may be printed on the

module housing) such as the order and serial number. I data is read-only, vendor-specific

module information.

Maintenance data (M data) is system-specific information such as the installation location

and date. M data is generated in the course of configuration and is written to the module

memory.

The modules can be uniquely identified in online mode by means of the I&M data.

Additional information

Information if and to what extent a DP device supports I&M data is available in the respective

device manual of the device.

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Functions

5.1

Isochronous mode

5.1.1

What is isochronous mode?

Why isochronous mode?

Assuming public transport were to operate at maximum speed while reducing stop times at

the passenger terminals to absolute minimum, the last thing many potential passengers

would notice of the departing contraption are its red tail lights. The overall travel time is,

however, decided by the train, bus or underground clock, because well adjusted timing is

essential to a good service. This also applies to distributed automation engineering. Not only

fast cycles but also the adaptation and synchronization of the individual cycles result in

optimum throughput.

Just-In-Time

Figure 5-1 System cycle

The high speed and reliable reaction time of a system operating in isochronous mode is

based on the fact that all data is provided just-in-time. The constant bus cycle time

PROFIBUS DP cycle beats the time here.

Functions

5.1 Isochronous mode

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Advantages of isochronous mode

The use of isochronous mode provides:

● Optimized controls

● Determinism

● Consistent (simultaneous) reading of input data

● Consistent (simultaneous) output of output data

5.1.2

Use of isochronous mode

The system property "isochronous mode" enables recording of measured values and

process data in a defined system cycle. Signal processing takes place in the same system

cycle all the way to switching to the "output terminal". This means isochronous mode

improves the control quality and provides greater manufacturing precision. Isochronous

mode drastically reduces the possible fluctuations of process response times. The time-

assured processing can be used for a higher machine cycle.

Isochronous mode is basically always the choice when acquisition of measured values

needs to be synchronized, movements need to be coordinated and process reactions need

to be defined and take place simultaneously. This means the areas of applications for

isochronous mode are manifold.

Functions

5.1 Isochronous mode

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5.1.3

Isochronous applications

Example: Isochronous measurement at several measuring points

QC requires precise measurement of dimensions within a camshaft production process.

Figure 5-2 Measuring of camshafts

Isochronous workflow

By using the system property "isochronous mode" and the associated simultaneous

measured value acquisition, measurement can be performed continuously and the time

required for measurement is reduced. Resultant workflow:

● Continuous turning of the camshaft.

● During the continuous turning, measure the positions and cam excursion synchronously.

● Process the next camshaft.

All camshaft positions and the corresponding measured values (red) are measured

synchronously within a single rotation of the camshaft. This increases machine output and

maintains or enhances precision of the measurement.

Functions

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5.1.4

Sequence of synchronization

From reading of input data to output of output data

The sequence of all components involved in the synchronization is explained in the

paragraphs below:

● Isochronous reading of input data

● Transport of input data by means of the PROFIBUS subnet to the DP master (CPU)

● Further processing in the isochronous application of the CPU

● Transport of output data by means of the PROFIBUS subnet to the output DP slave

● Isochronous output of output data

T_DC Date cycle

TI Time for reading the input data

TO Time for output of output data

Figure 5-3 Time sequence of synchronization

To ensure that all input data is ready for transportation via the PROFIBUS DP line when the

next PROFIBUS DP cycle begins, the I/O read cycle has a lead time TI so that it starts

earlier. The TI is the "flash gun" for all inputs. This TI is necessary to compensate for analog

to digital conversion, backplane bus times, etc. The lead time TI can be configured by

STEP 7 or by the user. We recommend that you have TI assigned automatically by STEP 7 .

The PROFIBUS DP line transports the input data to the DP master. The synchronous cycle

interrupt OB SynchronousCycle is called. The user program in the synchronous cycle

interrupt OB decides the process reaction and provides the output data in time for the start of

the next data cycle. The length of the data cycle is always configured by the user.

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To is the compensation from the backplane bus and the digital to analog conversion within

the slave. The To is the "flash gun" for all outputs. The time To can be configured by STEP 7

or by the user. We recommend that you have To assigned automatically by STEP 7.

Without isochronous mode, application, data transmission and field devices have their own,

unsynchronized processing cycles; these result in a higher total cycle time with high jitter.

With isochronous mode, application, data transmission and field device are synchronized

resulting in a minimum total cycle with minimum jitter.

Isochronous mode and non isochronous mode distributed I/O

It is possible to combine isochronous mode distributed I/O with non isochronous mode

distributed I/O on one DP master.

5.1.5

Requirements for configuration

Note the following requirements for configuration of isochronous mode:

● Isochronous mode cannot be used in optical PROFIBUS networks.

● Constant bus cycle time and isochronous mode are only possible with the bus profiles

"DP" and "User-defined".

● Isochronous mode is only possible with the DP interfaces integrated in the CPU.

Isochronous mode with CPs for PROFIBUS is not possible.

● Only the constant bus cycle time master is permitted as active station on the isochronous

PROFIBUS DP. OPs and PGs (for example, PCs with PG functionality) influence the time

behavior of the isochronous DP cycle and are therefore not permitted.

● Isochronous mode is not permitted across lines.

● Isochronous I/O can only be processed in process image partitions. Isochronous

consistent data transmission is not possible without the use of process image partitions.

The adherence to quantity structures is monitored because the number of slaves and

bytes on the DP master system is limited for each process image partition.

● The addresses of isochronous modules must be located in a process image partition.

● Full isochronous mode from "terminal" to "terminal" is only possible if all components

involved in the chain support the system property "isochronous mode".

Make sure you look for the entry "Isochronous mode" or "Isochronous processing" in the

information box of the module when you select it in the catalog.

● When you configure isochronous mode, you may not assign a SYNC/FREEZE group to

the slave.

Functions

5.1 Isochronous mode

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5.1.6

Configuring isochronous mode

Introduction

A SIMATIC automation solution can be connected to the isochronous PROFIBUS with the

isochronous mode function. Isochronous mode guarantees the synchronous reading of input

data, the processing and output of output data at the same (isochronous) intervals.

Basic procedure for configuration of isochronous mode

1. Setting the properties for isochronous mode on the DP slave:

– Isochronous DP cycle

– Isochronous mode of the modules

2. Setting the properties for isochronous mode on the modules:

– Synchronous cycle interrupt (SynchronousCycle)

– Process image partition

– Input delay

3. Create user program with access to isochronous I/O

Requirement

● The network view in STEP 7 is open.

● A CPU has been placed (e.g., CPU 1516-3 PN/DP).

● An interface module has been placed and networked with the CPU (e.g., IM 151-1 HF).

● I/O modules have been placed (e.g., 2DI x DC24V HF and 2DO x DC24V/0,5A HF).

Functions

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Configuring isochronous mode on the DP slave

1. Select the DP slave in the network view and navigate to the "isochronous mode" area in

the Inspector window.

2. Enable the option for synchronization to the DP cycle for the DP slave.

Default: The DP slaves get the Ti/To values from the subnet which means the values are

automatically the same for all DP slaves of the DP master system.

3. Enable the "Isochronous mode" option the the "Detail view" for all I/O modules you want

to operate in isochronous mode.

4. Repeat steps 1 and 3 for all DP slaves that you want to operate in isochronous mode.

Figure 5-4 Configuring isochronous mode on the DP slave

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Configuring synchronous cycle interrupt on the I/O module

1. Select an I/O module in the device view and navigate to the "I/O addresses" area in the

Inspector window.

– The option for isochronous mode is selected.

2. Select the synchronous cycle interrupt in the drop-down list.

Figure 5-5 I/O addresses - creating the synchronous cycle interrupt OB

3. Assign the process image partition configured in the CPU.

Figure 5-6 I/O addresses - assigning process image partitions

4. Repeat steps 1 and 3 for all I/O modules that you want to operate in isochronous mode.

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Programming isochronous mode

To operate your plant in isochronous mode, the user program must be structured

accordingly. This means you have to add a synchronous cycle interrupt in the STEP 7

project tree.

You access the isochronous I/O by means of a process image partition, which means the

addresses of the isochronous modules must be located in a process image partition. You

program access to isochronous I/O with the "SYNC_PI" instructions (updating the process

image partitions of the inputs) and "SYNC_PO" (updating the process image partition of the

outputs) in the synchronous cycle interrupt OB.

You call the "SYNC_PI" instruction at the start of the synchronous cycle interrupt OB,

provided you have selected the automatic setting for the delay time. You call the

"SYNC_PO" instruction at the end of the synchronous cycle interrupt OB.

5.1.7

Diagnostics and interrupt functions

The diagnostic and interrupt functions of STEP 7 are available for isochronous mode. These

reduce downtimes and simplify localization and elimination of faults.

Events, causes of errors and remedies

Below, you will find the events for diagnostic and interrupt functions and remedies for the

problem.

Table 5- 1 Events, causes of errors and remedies

Event

Cause of the error

Remedy

• Synchronous cycle interrupt OB is

started with the input parameter

EventCount > 0 (number of lost OB

calls since last OB call)

If configured:

• Call of the time error OB

• Diagnostic buffer entry "Buffer overflow

for OB6x events"

The synchronous cycle interrupt OB

takes too long.

• Shorten the synchronous cycle

interrupt OB.

• Increase the DP cycle.

• Reduce the delay time setting

(setting with isochronous mode at

synchronous cycle interrupt OB).

Error (negative RetVals) when updating

the isochronous process image partition

with SYNC_PI / SYNC_PO:

• Consistency warning

• Update time is after / before the

permitted access window.

SYNC_PI / SYNC_PO are not called

in the permitted access window in

the synchronous cycle interrupt OB,

which means they are called or

processed during the I/O data

transfer on PROFIBUS.

• Increase the delay time.

• Increase the DP cycle.

• Adapt the program.

Error when updating the isochronous

process image partition with

SYNC_PI / SYNC_PO:

• Access error

DP slave / module does not respond

/ is not available.

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5.1.8

Parameter settings for isochronous mode

Parameter changes as task of the field service technician

The task of a field service technician is to maintain the production process.

In this context the technician has to detect, localize and eliminate errors and performance

losses of isochronous mode.

All parameters which influence isochronous mode can be checked and configured using the

"Isochronous mode" dialog box.

Parameters should only be changed by experienced users or service technicians.

5.1.8.1

Viewing isochronous mode parameters

"Isochronous mode" dialog box

1. Select "Properties > Isochronous mode" in the Inspector window.

The "isochronous mode" dialog box opens with an overview of parameters which

influence isochronous mode.

Information on the individual parameters is available under "Detail overview".

2. Compare the values shown with the values in the documentation, or with the value

specified by a technician.

Figure 5-7 Viewing parameters for isochronous mode

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5.1.8.2

Change parameters

Changing parameters for the DP master system

You can change the parameters for isochronous mode in the "Constant bus cycle time"

dialog box.

1. Select the DP master system in the network view.

2. Select the section "Constant bus cycle time" in the Inspector window.

3. Change the parameters according to the received instructions.

Figure 5-8 Changing parameters for the DP master system

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Adapting the input delay

1. Select the input module in the device view.

2. Select the section "Inputs" in the Inspector window.

3. Adapt the input delay.

Figure 5-9 Adapting the input delay

Compile, load and save the changed configuration

1. Put the plant out of operation.

2. Select the CPU in the project navigator.

3. Select "Compile > Hardware" in the shortcut menu.

4. Select "Download to device" in the shortcut menu.

5. Save the project.

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5.2

Acyclical data exchange

Additional functionality with DPV1 devices (DP master/DP slaves)

DP masters and DP slaves that support DPV1 have the following additional functions

compared to the devices that support only DPV0:

● The acyclic data exchange between master and slave is supported.

● Interrupts can be set by a DPV1 slave which ensure handling of the interrupt-triggering

event in the master CPU.

Acyclic data exchange

Read/write data record, for example, to change the parameters of a slave during operation.

The data records of a module and the structure of these data records is available in the

documentation for the respective module.

The table below contains the instructions with their functions for access to DPV1 slaves.

Detailed information is available in the STEP 7 online help.

Table 5- 2 Instructions for access to DPV1 slaves

Instructions

Function (DPV1)

RDREC Read data record

WRREC Write data record

RALRM Receive interrupt from a DP slave.

(The instruction must be called in the OB that triggers the interrupt.)

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5.3

SYNC/FREEZE groups

Assigning the SYNC/FREEZE group to the DP slave

A DP master with the corresponding functionality can send the control commands SYNC

and/or FREEZE for synchronization of the DP slaves simultaneously to a group of DP

slaves. You must assign SYNC/FREEZE groups to the DP slaves for this purpose.

Requirement: A DP master system has been created in the project.

Procedure

To assign a DP slave to a SYNC/FREEZE group, follow these steps:

1. Select the DP interface of the DP slave you want to assign to a group in the device view

or network view.

2. Select the check boxes for the required SYNC/FREEZE groups under the group

"SYNC/FREEZE" in the Inspector window.

You can assign each DP slave to only one SYNC/FREEZE group.

Figure 5-10 Assigning the DP slave to a SYNC/FREEZE group

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Important information on the control commands SYNC and FREEZE

You can use the control commands SYNC and FREEZE in the DP master to synchronize the

DP slaves event-controlled. The DP master sends the control commands simultaneously to a

group of DP slaves in its master system. It does not take into consideration DP slaves that

have failed or are currently sending diagnostic information.

Requirement for synchronization using control commands is that you have assigned the DP

slaves to SYNC/FREEZE groups.

For a S7 CPU use the instruction DPSYC_FR (SFC 11) to synchronize the DP slaves.

When you select the DP master, you see a list of the eight SYNC/FREEZE groups under

"Properties > DP interface > SYNC/FREEZE" in the Inspector window.

Figure 5-11 SYNC/FREEZE groups on DP master

SYNC control command

The DP master uses the SYNC control command to cause a group of DP slaves to freeze

the states of their outputs to the current value.

The DP slaves save the output data of the DP master for the following frames. But the states

of the DP slave outputs remain unchanged.

Only after each new SYNC control command does the DP slave set its outputs to the values

that it has saved as the output data of the DP master.

The outputs are not updated cyclically again until the DP master has sent a UNSYNC control

command.

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FREEZE control command

After receiving the FREEZE control command from the DP master, the DP slaves of a group

freeze the current status of their inputs. The DP slaves send these frozen input data to the

DP master with the following cyclical frames.

The DP slaves freeze the current state of their inputs again after each new FREEZE control

command.

The state of the DP slave inputs is only send to the DP master cyclically again when the DP

master sends the UNFREEZE control command.

5.4

Interrupts

Interrupts and interrupt OBs for DPV1

Interrupts can be set by a DPV1 slave which ensure handling of the interrupt-triggering event

in the master CPU. The interrupt data is evaluated in the CPU and the diagnostics buffer and

the module state are updated even in the "STOP" operating mode. The OB is not processed

in STOP.

The following DPV1 interrupts are supported:

● Status interrupt

● Update interrupt

● Vendor-specific interrupt

Detailed information is available in the descriptions on the OBs. You can use the

corresponding OBs that are provided by the operating system of the S7 CPUs for diagnostic

interrupts, hardware interrupts, and pull/plug interrupts.

OB 55 interrupt - Status interrupt

The status interrupt can be triggered when the operating mode of a device or module

changes, for example, from RUN to STOP.

OB 56 interrupt - Update interrupt

An update interrupt can be triggered if the parameters of a slot were changed. This may be

caused by local access or partner access to the parameters.

OB 57 interrupt - Vendor-specific interrupt

The event that triggers the vendor-specific interrupt can be specified by the manufacturer of

a DPV1 slave.

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Additional information

A detailed description of the events at which interrupts are triggered is available in the

documentation of the respective manufacturer of the DPV1 slave.

5.5

Intelligent DP slaves (I-slaves)

5.5.1

I-slave functionality

The "I-slave" (intelligent DP slave) functionality of a CPU supports the exchange of data with

a DP master and thus allows the CPU to be used, for example, as intelligent preprocessing

unit of subprocesses. The I-slave is connected in its role as DP slave to a "higher-level" DP

master.

The preprocessing is handled by the user program in the I-slave. The process values

acquired by the I/O modules are preprocessed by the user program and made available to

the DP master.

Figure 5-12 I-slave functionality

"I-slave" naming convention

In the remainder of this description, a CPU or a CP with I-slave functionality is simply called

an "I-slave".

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Advantages of configurations with I-slaves

The I-slave offers the following advantages:

● Simple coupling of CPUs with PROFIBUS interface

● Real-time communication between CPUs and PROFIBUS interface

● Distributed processing

A complex automation task can be divided into smaller units/subprocesses. This results

in manageable processes which lead to simplified subtasks.

● Relieving the DP master by distributing the computing capacity to I-devices

● Lower communication load by processing process data locally

● Separating subprocesses

Complicated, widely distributed and extensive processes can be subdivided into several

subprocesses with manageable interfaces by using I-slaves. These subprocesses can be

stored in individual STEP 7 projects if necessary, which can later be merged to form one

master project.

● Separating STEP 7 projects

Creators and users of an I-device can have completely separated STEP 7 projects. The

GSD file together with the configuration of the transfer areas of the I-slave form the

interface between the STEP 7 projects. This allows coupling to standard DP masters via

a standardized interface.

● Know-how protection

Plant units can now only be delivered with a GSD file and the configuration of the transfer

areas instead of with a STEP 7 project for the I-slave interface description. This means

that you no longer have to disclose the user program know-how.

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Difference: DP slave - I-slave

In the case of a DP slave, the DP master accesses the distributed inputs/outputs directly.

In the case of an I-slave, the DP master accesses a transfer area in the I/O address space of

the preprocessing CPU instead of accessing the connected inputs/outputs of the I-slave. The

user program running on the preprocessing CPU is responsible for ensuring data exchange

between the operand area and inputs/outputs.

Figure 5-13 Data access to an I-slave

Note

DP master or DP slave

Note: The communication modules of the S7-1500 CPUs/ET 200SP CPUs, for example the

CP 1542-5, support the operation as DP master or DP slave only as alternative.

Note

The I/O areas configured for data exchange between the DP master and DP slaves must not

be used by I/O modules.

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5.5.2

Data exchange with higher-level DP master

Introduction

The following section describes the data exchange between the I-slave and the higher-level

DP master.

Transfer areas

Transfer areas are an interface to the user program of the I-slave CPU. Inputs are processed

in the user program and outputs are the result of the processing in the user program.

The data for communication between DP master and I-slave is made available in the transfer

areas. A transfer area contains an information unit that is exchanged consistently, in terms of

bytes, words or overall, between DP master and I-slave. You can find more information on

configuration and use of transfer areas in the section Configuring transfer areas (Page 84).

The following figure shows the data exchange between the I-slave and the higher-level DP

master. The individual communication relations are explained below based on the numbers.

Figure 5-14 Data exchange with the DP master

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① Data exchange between higher-level DP master and normal DP slave

In this way, the DP master and the DP slave exchange data through PROFIBUS.

② Data exchange between higher-level DP master and I-slave

In this way, the DP master and the slave exchange data through PROFIBUS.

The data exchange between a higher-level DP master and an I-slave is based on the

conventional DP master/DP slave relationship.

For the higher-level DP master, the transfer areas of the I-slave represent submodules of a

DP slave.

The output data of the DP master is the input data of the I-slave. Analogously, the input data

of the DP master is the output data of the I-slave.

③ Transfer relationship between the user program and the transfer area

In this way, the user program and the transfer area exchange input and output data.

④ Data exchange between the user program and the I/O of the I-slave

In this way, the user program and the centralized I/O of the I-slave exchange input and

output data.

5.5.3

Configuring an I-slave

Requirements for configuring an I-slave

The I-slave consists of:

● A CPU from S7-1500 and a communications module CM 1542-5/CP 1542-5

(STEP 7 as of V12)

● A CPU from ET 200SP and a communications module CM DP (STEP 7 as of V13 SP1)

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Procedure for configuring an I-slave

This section shows how to configure an I-slave in STEP 7 based on the example of a

CPU 1512SP-1 PN. The procedure for the CPUs from S7-1500 with CM 1542-5/CP 1542-5

and for the CPU 1510SP-1 PN with CM DP is the same.

To configure an I-slave, follow these steps:

1. Drag a CPU 1512SP-1 PN from the hardware catalog to the network view.

2. Open the device view of the CPU.

3. Double-click on the CM DP communications module in the hardware catalog.

STEP 7 creates the CM DP in the device view.

4. Select the PROFIBUS interface of the CM DP communications module.

5. In the Inspector window in the area navigation, select the "Operating mode" entry and

enable the "DP slave" check box.

6. Now you can select the DP master in the "Assigned DP Master" drop-down list.

Once you have selected the DP master, the networking and the DP master system

between both devices are displayed in the network view.

Figure 5-15 Configuring an I-slave

Note

Operation using a GSD file

If you operate an I-slave using a GSD file, you should not select the "Test, commissioning

and routing" check box.

Create a DP subnet on the PROFIBUS interface of the I-slave.

Result

You have configured an I-slave.

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5.5.4

Configuring transfer areas

Requirements for configuring transfer areas

● You have configured an I-slave in STEP 7.

● You are in the device view of the I-device and have selected the PROFIBUS interface of

the communications module.

Procedure for configuring transfer areas

To configure transfer areas for an I-slave in STEP 7, follow these steps:

1. In the area navigation, go to the section "Operating mode" > "I-slave communication" >

"Transfer areas".

2. Create transfer areas. Set the properties of the created transfer areas.

①

Click in the first cell of the "Transfer area" column. STEP 7 assigns a default name that you

can change.

②

Select the type of communication relation: Currently, you can only select MS for

"master-slave communication relation".

③

STEP 7 assigns the addresses for the transfer area automatically. Correct the addresses if

necessary.

④

Set the length of the transfer area. Specify the length of the transfer area in the cell in the

following format: [1...64] Byte/Word.

Examples: "32 Byte", "64 Word"

⑤

Specify whether the transfer area is exchanged in units of bytes or words or consistently

over the entire length between the DP master and I-slave.

Figure 5-16 Configuring transfer areas

A separate entry is created in the area navigation for each transfer area. If you select one of

these entries, you can adjust the details of the transfer area, or correct them and comment

on them.

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5.5.5

Sample program

Introduction

This simple sample program shows how you use the transfer areas of an I-slave.

Requirement

You have configured an I-slave.

Task

The result of an "AND logic operation" of two inputs (preprocessing) in the I-slave is to be

provided to the higher-level DP master. This result is to be assigned to a local output in the

DP master (further processing).

Use a transfer area with the following addresses for this purpose:

● Address in the I-slave: Q568

● Address in the DP master: I68

Required steps

The following steps are necessary to solve the task:

1. Configuring the transfer area

2. Programming the I-slave

3. Programming the DP master

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Configuring the transfer area

Configure a transfer area with the following properties in the I-slave:

Figure 5-17 Transfer area, I-slave sample program

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Programming the I-slave

To program the sample program for the I-slave, follow these steps:

1. Using the SCL programming language, create a new function with the name

"preprocessing" in the project tree under "Program blocks" > "Add new block". Open the

function.

2. In the interface of the function "preprocessing", create the following tags:

Name

Data type

Input/output type

input 1 bool Input

input 2 bool Input

result bool Output

3. In the instruction window of the function "preprocessing", write the following program

code:

#result:=#input 1&#input 2;

4. Call the function "preprocessing" in a cycle OB, for example, in OB1.

5. Wire the function "preprocessing" in the cycle OB as follows:

Figure 5-18 I-slave sample program

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Programming the DP master

To program the sample program for the DP master, follow these steps:

1. Using the SCL programming language, create a new function with the name "further

processing" in the project tree under "Program blocks" > "Add new block". Open the

function.

2. In the interface of the function "further processing", create the following tags:

Name

Data type

Input/output type

result bool Input

output bool Output

3. In the instruction window of the function "further processing", write the following program

code:

#output:=#result;

4. Call the function "further processing" in a cycle OB, for example, in OB1.

5. Wire the function "further processing" in the cycle OB as follows:

Figure 5-19 DP master sample program

Result

You mastered the task successfully.

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5.5.6

Diagnostics and interrupt behavior

S7 CPUs have numerous diagnostics and interrupt functions that can, for example, report

errors/faults or failures of underlying DP systems. These diagnostics alarms reduce

downtimes and simplify localization and elimination of problems.

Diagnostics options in the higher-level DP master and in the I-slave

The following diagnostics mechanisms are available to the higher-level DP master and the

I-slave:

● OB 82 (diagnostic interrupt)

When the I-slave changes mode, the DP master calls OB 82 (diagnostic interrupt).

When the DP master changes mode, the I-slave calls OB 82 (diagnostic interrupt).

● OB 86 (rack failure)

If the bus connection to the I-slave is interrupted, the DP master calls OB 86

(rack failure).

If the bus connection to the DP master is interrupted, the I-slave calls OB 86

(rack failure).

● OB 122 (I/O access error)

If you have not set the attribute "Handle errors within block" for OB 122, the following

applies:

– If the bus connection to the I-slave is interrupted, the DP master calls OB 122

(I/O access error) if there is direct access to the relevant transfer areas.

– If the bus connection to the DP master is interrupted, the I-slave calls OB 122

(I/O access error) if there is direct access to the relevant transfer areas.

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Reaction of the transfer areas to mode changes

Table 5- 3 Reaction of the transfer areas to mode changes

DP master

I-slave

Reaction of DP master input transfer areas

Reaction of I-slave input transfer areas

RUN→STOP RUN No updating of the process image The input transfer areas retain their current

values. (no access error)

STOP→RUN RUN The input transfer areas are updated by the

cyclic user program via the process image.

The input transfer areas are updated via the

process image.

RUN RUN→STOP The I-slave sets the input transfer areas on

the DP master to "0".

No updating of the process image

RUN STOP→RUN The I-slave sets the input transfer areas on

the DP master to "0".

After the startup program of the I-slave, the

input transfer areas of the DP master are

updated via the process image.

Prior to processing of the startup program,

the input transfer areas are updated via the

process image.

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Service & Support

The unmatched complete service for the entire life cycle

For machine constructors, solution providers and plant operators: The service offering from

Siemens Industry Automation and Drive Technologies includes comprehensive services for a

wide range of different users in all sectors of the manufacturing and process industry.

To accompany our products and systems, we offer integrated and structured services that

provide valuable support in every phase of the life cycle of your machine or plant – from

planning and implementation through commissioning as far as maintenance and

modernization.

Our Service & Support accompanies you worldwide in all matters concerning automation and

drive technology from Siemens. We provide direct on-site support in more than 100 countries

through all phases of the life cycle of your machines and plants.

You have an experienced team of specialists at your side to provide active support and

bundled know-how. Regular training courses and intensive contact among our employees –

even across continents – ensure reliable service in the most diverse areas.

Service & Support

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Online Support

The comprehensive online information platform supports you in all aspects of our Service &

Support at any time and from any location in the world.

You can find Online Support on the Internet at the following address: Internet

(http://www.siemens.com/automation/service&support).

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Support in planning and designing your project: From detailed actual-state analysis,

definition of the goal and consultation on product and system questions right through to the

creation of the automation solution.

Technical Support

Expert advice on technical questions with a wide range of demand-optimized services for all

our products and systems.

You can find Technical Support on the Internet at the following address: Internet

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Extend your competitive edge – through practical know-how directly from the manufacturer.

You can find the training courses we offer on the Internet at the following address: Internet

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requirements, from configuration through to implementation of an automation project.

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Our Field Service offers you services for commissioning and maintenance – to ensure that

your machines and plants are always available.

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In every sector worldwide, plants and systems are required to operate with constantly

increasing reliability. We will provide you with the support you need to prevent a standstill

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Optimization

During the service life of machines and plants, there is often a great potential for increasing

productivity or reducing costs.

To help you achieve this potential, we are offering a complete range of optimization services.

Modernization

You can also rely on our support when it comes to modernization – with comprehensive

services from the planning phase all the way to commissioning.

Service programs

Our service programs are selected service packages for an automation and drives system or

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The services of a Service Program can be flexibly adapted at any time and used separately.

Examples of service programs:

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Glossary

Automation system

Programmable logic controller for the open-loop and closed-loop control of process chains of

the process engineering industry and manufacturing technology. The automation system

consists of different components and integrated system functions according to the

automation task.

Bus

A common transfer route to which all nodes are connected; it has two defined ends.

In the case of PROFIBUS, the bus is a two-wire line or a fiber-optic cable.

Bus connector

Physical connection between the node and bus cable.

Bus system

All stations physically connected to a bus cable form a bus system.

Device

In the PROFIBUS environment, "device" is the generic term for:

● Automation systems (for example, PLC, PC)

● Distributed I/O systems

● Field devices (for example, hydraulic devices, pneumatic devices)

● Active network components

● Gateways to AS interface or other fieldbus systems

Device that can send, receive or amplify data via the bus, for example, a DP slave by means

of PROFIBUS DP.

Glossary

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Device

In the PROFIBUS environment, "device" is the generic term for:

● Automation systems (for example, PLC, PC)

● Distributed I/O systems

● Field devices (for example, hydraulic devices, pneumatic devices)

● Active network components

● Gateways to AS interface or other fieldbus systems

Device that can send, receive or amplify data via the bus, for example, a DP slave by means

of PROFIBUS DP.

Diagnostics

Monitoring functions for the recognition, localization, classification, display and further

evaluation of errors, faults and alarms. They run automatically during plant operation. This

increases the availability of systems/plants by reducing commissioning times and

downtimes.

DP master

CPU or device that conducts the communication with the DP slaves according to a defined

algorithm. To do this, the DP master uses the functions for communication with the DP

slaves which are defined by PROFIBUS DP. It acts according to standard EN 50170, Part 3.

→

Master

DP slave

Slave in the distributed I/O that is operated on the PROFIBUS with PROFIBUS DP protocol

and acts according to standard EN 50170, Part 3. The DP slave is addressed by the DP

master and provides it with specified functions (I/O data, diagnostics, etc.).

→

Slave

DPV1

The designation DPV1 refers to the functional extension of acyclic services (to include new

interrupts, for example) provided by the DP protocol. The DPV1 functionality is integrated in

IEC 61158/EN 50170, Volume 2, PROFIBUS.

FDL

Fieldbus Data Link (bus access protocol). Step 2 with PROFIBUS.

HMI device

Human Machine Interface, device for visualization and control of automation processes.

Glossary

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HSA

Highest Station Address. A bus parameter for PROFIBUS. Outputs the highest PROFIBUS

address of an active device. PROFIBUS addresses greater than HSA are permitted for

passive devices, up to 126.

Industrial Ethernet

Guideline for setting up Ethernet in an industrial environment. The main difference to the

standard Ethernet is the mechanical current carrying capacity and interference immunity of

the individual components.

I-slave

The "I-slave" functionality of a CPU supports the exchange of data with a DP master and can

thus be used, for example, as intelligent preprocessing unit of partial processes. The I-slave

is connected in its role as DP slave to a "higher-level" DP master.

Master

A master device that is in possession of the token can send data to other devices and

request data from them (= active device).

PCF

Polymer Cladded Fiber (plastic-covered glass fiber)

POF

Polymer Optical Fiber (plastic fiber-optic cable made of light-conducting plastics)

Process image

Address area in the system memory of the DP master. At the start of the cyclic program the

signal states of the input modules are transmitted to the process image of the inputs. And the

end of cyclic program execution, the process image of the outputs is transmitted to the DP

slave as signal state.

PROFIBUS

PROcess FIeld BUS, in IEC 61158-2 as "Type 3" standardized, bit-serial fieldbus system.

The standard specifies functional, electrical and mechanical properties.

PROFIBUS is a bus system that networks automation systems and field devices compatible

with PROFIBUS at the cell and field level. PROFIBUS is available with the protocols DP

(= distributed I/O), FMS (= fieldbus message specification) or PA (process automation).

Glossary

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PROFIBUS address

Unique identification of a device connected to PROFIBUS. The PROFIBUS address is

transmitted in the frame for addressing a device. A PC or programming device has the

PROFIBUS address "0". DP masters and DP slaves have a PROFIBUS address in the range

from 1 to 125.

PROFIBUS device

A PROFIBUS device has at least one PROFIBUS interface with an electrical (RS 485) or

optical (Polymer Optical Fiber, POF) interface.

PROFIBUS DP

A PROFIBUS with DP protocol that complies with EN 50170. DP stands for distributed I/O

(fast, real-time capable, cyclic data exchange). From the perspective of the user program,

the distributed I/Os are addressed in exactly the same way as the centralized I/Os.

PROFINET

Open component-based industrial communication system based on Ethernet for distributed

automation systems. Communication technology promoted by the PROFIBUS Users

Organization.

RS 485

Asynchronous data transmission process for PROFIBUS DP to ANSI TIA/EIA-RS485-A.

RS 485 repeater

Equipment for amplifying bus signals and for coupling segments over long distances.

Segment

The bus line between two terminating resistors forms a bus segment.

A bus segment can contain up to 32 bus nodes. Segments can be coupled, for example, by

means of RS 485 repeaters or diagnostics repeaters.

Slave

Distributed device in a fieldbus system that may exchange data with a master after being

requested to do so by the master. Slaves are all DP slaves, for example, such asET 200SP,

ET 200MP, ET 200AL.

Glossary

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Standard mounting rail

Standardized metal profile to EN 50022.

The standard mounting rail is used for quick snap-on installation of network components,

such as OLM, repeaters, etc.

Subnet

Part of a network whose parameters must be synchronized with the devices

(e.g., with PROFIBUS). A subnet includes the bus components and all connected stations.

SynchronousCycle

Name for synchronous cycle interrupt OB in STEP 7.

Target-Rotation-Time (Ttr)

Bus parameter for PROFIBUS. The token is the send permission for a device on

PROFIBUS. A device compares a token rotation time it has measured with the Target-

Rotation-Time and controls the sending of frames with high priority or low priority based on

this comparison.

Terminating resistor

Component that terminates the ends of a data transmission line to prevent reflections in the

transmission medium.

Terminator

Terminating resistor of bus segments with transmission rates of 9.6 kbps to 12 Mbps. The

power supply is separate from the bus nodes.

TIA Portal

Totally Integrated Automation Portal

Topology

Structure of a network. Common structures are line topology, ring topology, star topology

and tree topology.

Transmission rate

Specifies the number of bits transmitted per second.

Watchdog

Mechanism for monitoring the readiness for operation.

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Index

Acyclic data exchange, 74

Address assignment, 45

Addressing, 42

Bus connector

IP20, 22

M12 with IP65, 24

Bus parameters

Adapting, 50

Description, 52

Value ranges, 54

Bus profile, user-defined, 54

Bus terminal

M12, 24

RS 485, 24

Cable configuration, 49

Cables, 19

Calculate bus times, 51

CANopen module, 30

Communication

I/O communication, 14

Communication load, 51

Components, (See network components)

Configuration, 42

Configuring isochronous mode, 68

Basic procedure, 67

DP slave, 68

Requirements, 66

Updating the process image partition, 69

Connecting PROFIBUS DP with PROFINET IO, 41

Constant bus cycle time, 55

Data exchange between IO systems, 81

Diagnostic repeater

Cascade depth, 37

Diagnostics, 60

Topology, 37

Diagnostics, 57

Display alarms, 58

I-slave, 89

Isochronous mode, errors and remedies, 70

Diagnostics repeater

Description, 29

Display, diagnostic messages, 58

DP master

Operated as, 80

DP slave, 43

Operated as, 80

DP/AS-i F-Link, 31

DP/AS-i LINK Advanced, 31

DP/AS-Interface Link 20E, 31

DP/DP coupler, 30

DP/PA bus link, 31

Example of isochronous mode, 64

FastConnect system, 20

Fiber-optic, 27

Fiber-optic cables, 25

Glass, 27

Optical ring, 49

PCF, 26

Plastic, 26

GAP factor, 54

Hardware

Configuring, 42

Parameter assignment, 42

Index

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I/O addresses, 69

I/O communication, 14

Identification and maintenance data (I&M data), 61

IE/PB Link PN, 30

Increasing DP cycle time, 56

Installation, 17

Active network components, 29

Bus connection, 22

Cables, 19

FastConnect, 20

Topology, 35

Interrupt OBs, 77

Interrupts

DPV1, 77

Isochronous mode, 70

IO system

Data exchange, 81

I-slave (intelligent DP slave)

Diagnostics, 89

Interrupt behavior, 89

Isochronous mode

Change parameters, 71

Description, 62

Diagnostics, 70

Dialog box for isochronous mode, 71

Example, 64

Interrupts, 70

Sequence, in principle, 65

IWLAN/PB Link PN IO, 30, 40

M12

Bus connector, 24

Bus terminating resistor, 24

M12 bus terminating resistor, 24

Maximum cable lengths

Maximum cable lengths, 20

Network, 18

electrical, conducted, 29

Optical, 33

optical, electrical, 18

Selection criteria, 18

Topology, 35

Network components

Bus connections, 20

CANopen module, 30

Diagnostics repeater, 29

DP/AS-i F-Link, 31

DP/AS-i LINK Advanced, 31

DP/AS-Interface Link 20E, 31

DP/DP coupler, 30

Fiber-optic cables, 25

IE/PB Link PN, 30

IWLAN/PB Link PN IO, 30

OBT, Optical Bus Terminal, 33

OLM, Optical Link Module, 33

PROFIBUS terminator, 30

RS 485 cables, 19

RS485, 29

Network settings, 46

Optical Bus Terminal, OBT, 33

Optical Link Module, OLM

Description, 33

Topology, 40

Optical ring, 49, 50

Parameter assignment, 42

Process image partition, 69

PROFIBUS

Address, 45

Devices, 12

Installation, 17

PROFIBUS DP, 11

Protocols, 10

RS 485 cables, 19

PROFIBUS address, 45

Change, 45

HSA, 46

PROFIBUS DP

Applications, 11

Assigning the DP slave, 43

Connecting with PROFINET, 41

Definition, 10

Devices and designations, 13

Interface, 16

PROFIBUS DP interface

Properties, 16

Representation in STEP 7, 16

PROFIBUS terminator, 30

Profiles for network settings

DP, Standard, 46

User-defined, 48

Index

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PROFINET Proxy functionality, 41

Programming isochronous mode, 70

Retry limit, 50, 54

RS 485 cables, 20

RS485 repeater

Description, 29

Topology, 35

Slot time, 50, 54

SYNC/FREEZE, 75

Synchronization, sequence, 65

Synchronous cycle interrupt, 69

Synchronous cycle interrupt OB,

SynchronousCycle, 70

SynchronousCycle, synchronous cycle interrupt OB, 70

Target Rotation Time, 54

Topology

Connecting PROFIBUS DP with PROFINET, 41

OLM, 40

RS485 repeater, 35

WLAN, 40