Siemens SIMATIC IM 178-4 User Manual

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Preface, Contents

SIMATIC

IM 178-4

Manual

This manual is part of the product with order number:

6ES7 178-4BH00-0AE0

Part 1: User Information

Product Overview Installing and Removing the

Module

Wiring

Parameter Assignment

Preparing for Startup

Part 2: Reference Section

Functions of the IM 178-4

Diagnostics

2 3 4 5

6 7

Appendix

Technical Specifications Configuration and

Parameter Assignment Frame for the IM 178-4

Glossary, Index

Safety Guidelines

This manual contains notices which you should observe to ensure your own personal safety, as well as to protect the product and connected equipment. These notices are highlighted in the manual by a warning triangle and are marked as follows according to the level of danger:

Danger

indicates that death, severe personal injury or substantial property damage will result if proper precautions are not taken.

Warning

indicates that death, severe personal injury or substantial property damage can result if proper precautions are not taken.

Caution

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

Note

draws your attention to particularly important information on the product, handling the product, or to a particular part of the documentation.

Qualified Personnel

Only qualified personnel should be allowed to install and work on this equipment. Qualified persons are defined as persons who are authorized to commission, to ground, and to tag circuits, equipment, and systems in accordance with established safety practices and standards.

Correct Usage

Note the following:

Warning

Trademarks

This device may only be used for the applications described in the catalog or the technical description, and only in connection with devices or components from other manufacturers which have been approved or recommended by Siemens.

This product can only function correctly and safely if it is transported, stored, set up, and installed correctly , and operated and maintained as recommended.

SIMA TICR, SIMA TIC HMIR and SIMA TIC NETR are registered trademarks of SIEMENS AG. Third parties using for their own purposes any other names in this document which refer to trademarks

might infringe upon the rights of the trademark owners.

The reproduction, transmission or use of this document or its contents is not permitted without express written authority. Offenders will be liable for damages. All rights, including rights created by patent grant or registration of a utility model or design, are reserved.

Siemens AG Bereich Automatisierungs- und Antriebstechnik Geschaeftsgebiet Industrie Automatisierungssystem Postfach 4848, D- 90327 Nuernberg

Index-2

Siemens Aktiengesellschaft C79000-G7076-C178

We have checked the contents of this manual for agreement with the hardware and software described. Since deviations cannot be precluded entirely, we cannot guarantee full agreement. However, the data in this manual are reviewed regularly and any necessary corrections included in subsequent editions. Suggestions for improvement are welcomed.

E Siemens AG 1998 Subject to change without prior notice.

C79000-G7076-C178-01

IM 178-4

Preface

Purpose of the Documentation

This manual describes all the steps necessary to use the function module IM 178-4. It will help you to become familiar with the functions of the IM 178-4 quickly and effectively.

Content of the Manual

This manual describes the hardware and software of the IM 178-4. It deals with the following topics:

S Product overview S Installation and removal of the module S Wiring S Parameter assignment S Starting up S Functions S Diagnostics S Appendix

Audience

The manual is intended for the following audience:

S Fitters S Programmers S Commissioning engineers S Service and maintenance personnel

Applicability of the Manual

This manual contains the description of the function module IM 178-4 valid at the time of publication. We reserve the right to describe modifications in the functionality of the IM 178-4 in a Product Information leaflet.

IM 178-4 C79000-G7076-C178-01

iii

Preface

Finding Your Way in the Manual

To help you find specific information quickly, the manual includes the following :

S At the start of the manual, you will find a complete table of contents. S In the Appendix, you will find a glossary in which the most important

terminology used in the manual is explained.

S At the end of the manual, you will find a comprehensive index with which you

can locate topics and specific information quickly.

Other Literature Required

To understand this manual, you should also be familiar with the manual

Distributed I/O System

Standards

The S7-300 programmable controller complies with the standard IEC 1131.

Recycling and Disposal

The SIMATIC S7-300 is an environmentally friendly product! The SIMATIC S7-300 has the following environmental features:

S Plastic casing highly fireproof despite halogen–free flame protection S Labeled by laser (in other words no unnecessary labels) S Plastic materials indicated in compliance with DIN 54840 S Less material used due to small dimensions, less components due to

integration in ASICs The SIMATIC S7-300 is suitable for recycling due to its low pollutant content . For environmentally friendly recycling and disposal of your old SIMATIC PLC using

the most modern methods, contact:

ET 200

Siemens Aktiengesellschaft Anlagenbau und Technische Dienstleistungen ATD TD 3 Kreislaufwirtschaft Postfach 32 40 D-91050 Erlangen Germany

Phone: ++49 / 91 31 / 73 36 98 Telefax: ++ 49 / 91 31 / 72 66 43

This Siemens department offers individual counseling and a comprehensive and flexible disposal system at a fixed price. Following disposal, you receive a breakdown of the materials and a certification of the materials.

C79000-G7076-C178-01

IM 178-4

CD-ROM

You can also order the entire SIMATIC S7 documentation on a CD-ROM.

Further Support

If you have questions about using the product described in the manual and cannot find the answer here, please contact your local Siemens representative. You will find the addresses in the appendix ”SIEMENS Worldwide” in the

Programmable Controller, Hardware and Installation, CPU Data”

If you have questions or comments about the manual itself, please complete the reply card at the end of the manual and send it to address shown. Please take a few minutes to give your own personal assessment of the manual on the reply card.

To familiarize users with the SIMATIC automation systems, we offer a variety of training courses. If you are interested in these courses, please contact your Regional Training Center or the Central Training Center in D-90327 Nürnberg, Germany, Tel. ++49/911/895 3154.

Preface

”S7-300, M7-300

manual

The Latest Information

You can always obtain the very latest information about SIMATIC products from the following sources:

S On the Internet: http://www.aut.siemens.de/ S By calling fax polling no. 08765-93 00 5000

Our SIMATIC Customer Support also supports you with up-to-date information and downloads, that you may find helpful when using SIMATIC products:

S On the Internet: http://www.aut.siemens.de/simatic–cs S In the SIMATIC Customer Support Mailbox: number

+49 (911) 895-7100 If you connect to the mailbox, use a modem with up to V.34

(28.8 Kbauds), with the following parameter settings: 8, N, 1, ANSI, or dial on ISDN (x.75, 64 Kbps).

SIMATIC Customer Support is available at the following phone and fax numbers or e–mail addresses. You can also send enquiries by mail on the Internet or by mail to the mailbox number above.

IM 178-4 C79000-G7076-C178-01

Preface

Nuremberg

Johnson City

Singapore

Simatic Basic Hotline

Nuremberg SIMA TIC BASIC Hotline

Local time: Mo.-Fr . 8:00 to 18:00

Phone: +49 (911) 895-7000 Fax: +49 (911) 895-7002 E-mail: simatic.support@

nbgm.siemens.de

SIMA TIC Premium Hotline

(charged, only with SIMA TIC Card)

Time: Mo.-Fr . 0:00 to 24:00 Phone: +49 (911) 895-7777 Fax: +49 (911) 895-7001

Johnson City SIMA TIC BASIC Hotline

Local time: Mo.-Fr . 8:00 to 17:00

Phone: +1 423 461-2522 Fax: +1 423 461-2231 E-mail: simatic.hotline@

sea.siemens.com

Singapore SIMA TIC BASIC Hotline

Local time: Mo.-Fr . 8:30 to 17:30

Phone: +65 740-7000 Fax: +65 740-7001 E-mail: simatic@

singnet.com.sg

C79000-G7076-C178-01

IM 178-4

1 Product Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 What Can the IM 178-4 Do? 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Fields of Application of the IM 178-4 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 The Hardware of the IM 178-4 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 Installing and Removing the Module 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 Wiring 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 Pinout of the Front Connector 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Description of the Individual Pins (Notes, Explanations) 3-4. . . . . . . . . . . . . . .

3.3 Wiring the Front Connector 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Wiring and Connecting the Bus Connector 3-8. . . . . . . . . . . . . . . . . . . . . . . . . .

4 Parameter Assignment 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Methods of Assigning Parameters to the IM 178-4 4-1. . . . . . . . . . . . . . . . . . .

4.2 GSx File 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 Preparing for Startup 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Setting the PROFIBUS Address of the IM 178-4 5-1. . . . . . . . . . . . . . . . . . . . .

5.2 Checklist of the Mechanical Construction 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Checklist for Configuration/Parameter Assignment 5-3. . . . . . . . . . . . . . . . . . .

6 Functions of the IM 178-4 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 Description of the Functions 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1.1 Cyclic Processing 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1.2 Error Monitoring 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2 User Data Interface 6-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 Diagnostics 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1 Status and Diagnostic LEDs 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2 Diagnostic Data of the IM 178-4 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2.1 Structure of Slave Diagnostics 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2.2 Structure of the First 6 Bytes of the Slave Diagnostic Data 7-4. . . . . . . . . . . .

7.2.3 Structure of the ID-Related and Device-Related Slave Diagnostic Data 7-6.

IM 178-4 C79000-G7076-C178-01

vii

Contents

A Technical Specifications A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.1 Technical Data of the IM 178-4 A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B Configuration and Parameter Assignment Frame for the IM 178-4 B-1. . . . . . . . . .

B.1 Structure of the Configuration Frame B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B.2 Structure of the Parameter Assignment Frame B-2. . . . . . . . . . . . . . . . . . . . . .

B.2.1 Standard Section of the Parameter Assignment Frame B-2. . . . . . . . . . . . . . .

B.2.2 Parameters for the DP Attachment B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B.2.3 Technological Parameters B-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Glossary Glossary-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Index Index-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

viii

C79000-G7076-C178-01

IM 178-4

Product Overview

Order Number

The product has the order number: 6ES7 178-4BH00-0AE0

Components of the product

1 Module 1 CD ROM with the following content:

S the readme.wri, liesmich.wri, lisezmoi.wri, leggimi.wri and leame.wri files S the Englisch, German, French and Italian manual for the IM 178-4

(IM178_E.PDF, IM178_D.PDF, IM178-4_F.PDF, IM178-4_I.PDF)

S Device database:

– German: SIEM8064.GSG – English: SIEM8064.GSE – French: SIEM8064.GSF

– Italian: SIEM8064.GSI

S the bitmap files IM178__N.BMP and IM178__S.BMP S Acrobat Reader

IM 178-4 C79000-G7076-C178-01

1-1

Product Overview

1.1 What Can the IM 178-4 Do?

What Can the IM 178-4 Do?

The IM 178-4 is a DP slave with a fixed number of I/Os and has the same design as S7-300 modules. It has two technologically identical but independent channels for position detection of incremental position encoders and/or SSI position encoders and for controlling analog drives ("10 V). The module is attached to the DP network via a 9 pin sub-D male connector.

Per channel, the module has the following: S One input for position detection with SSI position encoders or incremental

encoders with 5 V differential signals

S One analog output "10 V S 3 digital inputs (2 with fixed functions) S 3 digital outputs that you can use as required.

1.2 Fields of Application of the IM 178-4

Where can you use the IM 178-4?

The IM 178-4 is required mainly by users who want to create distributed position detection and positioning systems in conjunction with conventional drives with an analog interface ("10 V) and conventional displacement measuring systems (SSI, incremental position encoders with 5V differential signals). The technological functionality is no longer in the individual positioning modules as previously but in a powerful centralized controller.

1-2

C79000-G7076-C178-01

IM 178-4

1.3 The Hardware of the IM 178-4

Module Overview

The following diagram shows the IM 178-4 module with its front connector.

Diagnostic LEDs

Product Overview

Front Connector

Type Label

Labeling Strip

Figure 1-1 The IM 178-4 Module

Front Connector

With the IM 178-4, the following attachments are possible via the front connector: S 2 inputs for position detection with SSI position encoders or incremental

position encoders with 5 V differential signals

S 6 digital inputs S 6 digital outputs S 2 analog outputs "10 V S Power supply 1L+ S Load voltage 2L+

The front connector must be ordered separately (order number 6ES7 392-1AM00-0AA0

Order Number

Version

IM 178-4 C79000-G7076-C178-01

1-3

Product Overview

Labeling Strip

The module has a labeling strip on the right front panel that you can label with your signal names.

The inner side of the right front panel has the pinout of the IM 178-4.

Order Number and Version

The order number and version are shown at the bottom of the front panel.

Status and Diagnostics LEDs

Labeling Color Function

SF red Group error (technology)

BF red Bus error ON green Operating display 0I0 green Digital input 0 of channel 0 0I1 green Digital input 1 of channel 0 0I2 green Digital input 2 of channel 0

0Q0 green Digital output 0 of channel 0 0Q1 green Digital output 1 of channel 0 0Q2 green Digital output 2 of channel 0

1I0 green Digital input 0 of channel 1 1I1 green Digital input 1 of channel 1 1I2 green Digital input 2 of channel 1

1Q0 green Digital output 0 of channel 1 1Q1 green Digital output 1 of channel 1 1Q2 green Digital output 2 of channel 1

1-4

C79000-G7076-C178-01

IM 178-4

Installing and Removing the Module

Selecting the Location

A horizontal installation is preferable. If you install the module vertically, remember that the ambient temperature is restricted (max. 40 _C).

Important Safety Rules

For modules in the S7-300 design, there are important rules that must be kept to. These rules and regulations are explained in the manual

Controller, Hardware and Installation, CPU Data

Rules

When installing the IM 178-4, no particular measures are necessary regarding electrostatic discharge (ESD).

Required Tools

S7-300 Programmable

Installation

To install or remove the IM 178-4, you require a 4.5 mm screwdriver.

To install the IM 178-4 on a rail, follow the steps outlined below. For further information about installing modules, refer to the manual

Controller, Hardware and Installation, CPU Data

1. Hook the IM 178-4 on to the rail and push in the bottom section of the module.

2. Screw the IM 178-4 tight (torque approximately 0.8 to 1.1 Nm).

3. Plug in the front connector and screw it tight.

4. Fit the shield contact element. The order number of the shield contact element is 6ES7 390-5AA00-0AA0.

5. Plug in the bus connector. The order number of the bus connector is 6ES7 972-0BA10-0XA0 or

6ES7 972-0BB10-0XA0.

S7-300 Programmable

IM 178-4 C79000-G7076-C178-01

2-1

Installing and Removing the Module

Removing/Replacing the Module

To remove the IM 178-4, follow the steps outlined below. For further information about removing modules, refer to the manual

Hardware and Installation, CPU Data

1. Turn off the auxiliary voltage and the load voltage at the front connector.

2. Open the front panel. If you require it, remove the label from inside the panel.

3. Release the mounting screw on the front connector and remove the connector.

4. Unplug the bus connector.

Note

If the LAN cable is connected through, you can remove the bus connector from the DP interface without interrupting the data exchange on the bus.

5. Release the mounting screw on the module.

S7-300 Programmable Controller,

6. Pull out the bottom of the module from the rail and remove it upwards.

7. If required, install the new module.

2-2

C79000-G7076-C178-01

IM 178-4

Wiring

3.1 Pinout of the Front Connector

Front connector

You connect the position encoders, the analog outputs, the digital inputs and outputs, the sensor power supply and the module voltage via the 40-pin front connector.

Figure 3-1 shows the front of the module, the front connector and the inner side of the front panel with the pinout plan.

Front connectorFront view of the module Inside the front panel

Figure 3-1 Front Connector of the IM 178-4

1 2 3

4 5 6 7 8

9 0

2 2

3 4

2 2

9 0

IM 178-4 C79000-G7076-C178-01

3-1

Wiring

Pinout of the Front Connector

Table 3-1 Pinout of the Front Connector

1 M OUT – Sensor power supply ground 2 5.2 V DC OUT – 5 V sensor power supply 3 24 V DC OUT – 24 V sensor power supply 4 0A/SDI IN – Channel 0 count signal A / serial data input 5 0A/SDI IN – Channel 0 count signal A / serial data input, inverted 6 0B IN – Channel 0 count signal B 7 0B IN – Channel 0 count signal B, inverted 8 0N IN – Channel 0 zero mark 9 0N IN – Channel 0 zero mark, inverted 10 0CLS OUT – Channel 0 shift clock CLS 11 0CLS OUT – Channel 0 shift clock CLS, inverted 12 1A/SDI IN – Channel 1 count signal A / serial data input 13 1A/SDI IN – Channel 1 count signal A / serial data input, inverted 14 1B IN – Channel 1 count signal B 15 1B IN – Channel 1 count signal B inverted 16 1N IN – Channel 1 zero mark 17 1N IN – Channel 1 zero mark, inverted 18 1CLS OUT – Channel 1 shift clock CLS 19 1CLS OUT – Channel 1 shift clock CLS, inverted 20 – 21 1L+ IN – Auxiliary voltage 1L+ 22 M IN – Auxiliary voltage ground 23 0AO OUT – Analog output 0AO 24 0BS OUT – Reference signal 0BS 25 1AO OUT – Analog output 1AO 26 1BS OUT – Reference signal 1BS 27 0I0 IN green Digital input 0I0 28 0I1 IN green Digital input 0I1 29 0I2 IN green Digital input 0I2 30 0Q0 OUT green Digital output 0Q0 31 0Q1 OUT green Digital output 0Q1 32 0Q2 OUT green Digital output 0Q2 33 1I0 IN green Digital input 1I0

Name Input/

Output

LED Function

3-2

C79000-G7076-C178-01

IM 178-4

Table 3-1 Pinout of the Front Connector

Wiring

Pin FunctionLEDInput/

34 1I1 IN green Digital input 1I1 35 1I2 IN green Digital input 1I2 36 1Q0 OUT green Digital output 1Q0 37 1Q1 OUT green Digital output 1Q1 38 1Q2 OUT green Digital output 1Q2 39 2L+ IN – Load voltage 2L+ 40 2M IN – Load voltage ground

Name

Output

Note

If you supply the sensor with an external voltage, connect the ground of the external voltage to the ground of the module (terminal 1 or 22).

IM 178-4 C79000-G7076-C178-01

3-3

Wiring

3.2 Description of the Individual Pins (Notes, Explanations)

24 V Power Supply

For the power supplies of the IM 178-4, connect a DC voltage of 24 V to pins 1L+ and M and 2L+ and 2M.

Caution

Make sure that the polarity of the 24 V power supply is correct otherwise the module will be damaged.

The 24 V power supply must meet the following requirements: Only an extra-low DC voltage of ≤ 60 V that is safely isolated from the main power

supply must be used as the 24 V power supply. Safe isolation of the power supply can be achieved by adhering to the requirements of VDE 0100 Part 410 / HD 384-4-41 / IEC 364-4-41 (as functional extra-low voltage with safe isolation) or VDE 0805 / EN 60950 / IEC 950 (as safety extra-low voltage SELV) or VDE 0106 Part 101.

5.2 V and 24 V Sensor Power Supplies

From the 24 V power supply 1L+/M, the module generates a voltage of 5.2 V. This voltage is applied to DC5.2V (pin 2) as a short-circuit proof power supply for the sensors and can accept a maximum load of 600 mA. The ground of the sensor power supply is connected to M (Pin 1).

For sensors that require a power supply of 24 V, the short-circuit protected auxiliary voltage is available at DC24V (Pin 3).

Note

A short-circuit of the 5.2 V sensor power supplies leads to a failure of the module.

Sensor Pins

Per channel, you can connect two different sensor types using shielded cables, as follows:

S Incremental sensors complying with RS 422:

The signals A, A, B, B and N, N are connected via the correspondingly labeled pins.

3-4

S SSI position encoders:

The signals SDI, SDI and CLS, CLS are connected to the correspondingly labeled pins.

C79000-G7076-C178-01

IM 178-4

Digital Inputs I0 to I2

Per channel, the IM 178-4 has three digital inputs. These are operated with a rated voltage of 24 V.

The digital inputs are electrically isolated from the DP interface and the sensor signals.

The digital inputs I0 and I1 have fixed functions depending on the parameter assignment (see Chapter 6). Pin I0 must be connected using a shielded cable.

Digital Outputs Q0 to Q2

Per channel, the IM 178-4 has three digital outputs. These are supplied from the 24 V power supply 2L+.

The digital outputs are electrically isolated from the DP interface and the sensor signals.

The digital outputs are current–sourcing switches and can accept a load current of

0.5 A. They are protected against overload and short–circuits.

Wiring

Note

The direct connection of relays and contactors is possible without external protective circuits.

Analog Outputs

Per channel, the IM 178-4 has one analog output of ±10 V with a resolution of ±13 bits.

The analog outputs must be connected using shielded cables.

Note

Turning on the auxiliary voltage 1L+ can lead to the analog outputs supplying a spurious pulse for several ms. This spurious pulse must not cause the power circuits to be activated. This must be avoided by appropriate external wiring of the module (digital output to enable the power circuits).

IM 178-4 C79000-G7076-C178-01

3-5

Wiring

3.3 Wiring the Front Connector

Cables

When selecting suitable cables, follow the rules outlined below:

S The cables for digital inputs 0I0 and 1I0 must be shielded. S The cables for the position encoder signals must be shielded; the pairs of cores

must be twisted.

S The shields of the cables for the count signals must be connected to ground

both at the position encoder and in the immediate vicinity of the module, for example using the shield contact element.

S Use flexible cables with cross–sections of 0.25 to 1.5 mm2. S The cables for the analog outputs must be shielded.

Note

If the sensor is supplied with power from the module, the conductor cross-section must be large enough so that the required voltage is applied to the sensor despite the voltage drop along the cable.

S A wire-end ferrule is not required. If you use wire-end ferrules, use only those

without an insulation collar according to DIN 46228 form A, short version!

Tools Required

A 3.5 mm screwdriver.

3-6

C79000-G7076-C178-01

IM 178-4

Wiring Procedure

When wiring the front connector, follow the steps outlined below:

Warning

Risk of personal injury. If you wire the front connector of the IM 178-4 with the power supply on, you may

be injured by the electrical current. Make sure that you wire the IM 178-4 only when the power supply is turned off.

1. Open the front panel and bring the front connector into a position so that you can wire it.

2. Strip the insulation from the wires (remove 6 mm of the insulation).

3. Are you using wire–end ferrules? If yes: Crimp the wire-end ferrules onto the wires.

Wiring

4. Thread the accompanying strain relief into the front connector.

5. If the wires are led out towards the bottom, start wiring from the bottom, otherwise from the top. You should also screw down terminals that are not in use (tightening torque 0.6 to 0.8 Nm).

6. Pull the strain relief for the cables tight.

7. Screw the front connector into the operating position.

8. Establish contact between the shields of the cables on the shield contact element or on the shield contact rail.

9. Enter the terminal assignments on the pinout plan.

Figure 3-2 shows the IM 178-4 with shielded cables and a shield contact element.

IM 178-4 C79000-G7076-C178-01

3-7

Wiring

Figure 3-2 Connecting Shielded Cables to the IM 178-4

Note

For a detailed description of wiring the front connector, refer to the manual

Programmable Controller, Hardware and Installation, CPU Data

3.4 Wiring and Connecting the Bus Connector

LAN Cable

As the LAN cable, use the PROFIBUS shielded twisted pair cable or fiber-optic cable. For ordering information, refer to the Catalog

Cable Lengths

For information about the length of the LAN cable in a segment and about interconnecting segments, refer to the manuals describing the DP master.

The cable lengths specified in these manuals are only guaranteed for the PROFIBUS cable (see Catalog

ST 70

S7-300

3-8

C79000-G7076-C178-01

IM 178-4

Attaching the LAN Cable

Connect the LAN cable to the bus connector with order numbers 6ES7 972-0BA10-0XA0 or 6ES7 972-0BB10-0XA0 ... as follows:

1. Strip the insulation from the LAN cable as shown in Figure 3-3.

6XV1 830–0AH10/-3BH10 6XV1 830–3AH10

Wiring

7,5 9

Figure 3-3 Lengths for Stripping Insulation for the Bus Connector (6ES7 972-0B?0-0XA0)

120

7,5 9

2. Open the casing of the bus connector by undoing the casing screws and removing the cover.

3. Fit the green and red wire in to the screw terminal block as shown in Figure 3-4. Make sure that you always connect the same wire to the same terminal A or B

(for example terminal A is always wired with the green wire and terminal B always with the red wire).

4. Press the cable jacket between the two clamping posts. This fixes the cable in place.

5. Screw the green and red wire into the terminal block.

LAN cable connection for first and last node in the segment

LAN cable connection for all other nodes in the segment

: The LAN cable can be connected to the right or left terminals!

Figure 3-4 Connecting the LAN Cable to the Bus Connector (6ES7 972-0B?10 0XA0)

6. Screw the casing back together. Make sure that the cable shield makes contact with the shield clamp.

IM 178-4 C79000-G7076-C178-01

A B A B A B A B

3-9

Wiring

Connecting the Bus Connector

To connect the bus connector, follow the steps outlined below:

1. Plug the bus connector on to the IM 178-4.

2. Secure the bus connector on the IM 178-4 with the screws.

3. If the bus connector is at the start or end of a segment, the terminating resistor must be activated (switch setting ”ON”) (see Figure 3-5).

Make sure that the nodes on which the terminating resistor is activated are always supplied with voltage during startup and operation.

Terminating resistor activated

on off

Terminating resistor not activated

on off

Figure 3-5 Bus connector (6ES7 972-0B?10-0XA0): Terminating resistor activated and

deactivated

3-10

C79000-G7076-C178-01

IM 178-4

Parameter Assignment

4.1 Methods of Assigning Parameters to the IM 178-4

Requirements for Assigning Parameters with Hardware Configuration

To use Hardware Configuration when assigning parameters to the IM 178-4, make the following preparations:

1. Copy the file SIEM8064.gse to the STEP 7 directory S7DATA\GSD, for example using the menu command Options"Install New DDB ...

2. Copy the files im178__n.bmp and im178__s.bmp to the STEP 7 directory S7DATA\NSBMP.

3. Update the local module catalog (in STEP 7 V4.02 with the menu command Options"Update Catalog).

You will then find the IM 178-4 in the hardware catalog under Other FIELD DEVICES\OTHER.

Requirements for Parameter Assignment With COM PROFIBUS

Before you can use COM PROFIBUS to assign parameters to the IM 178-4, you must make the following preparations:

1. Copy the files SIEM8064.gsd, SIEM8064.gse, SIEM8064.gsf and SIEM8064.gsi to the PROFIBUS GSD folder.

2. Copy the files im178__n.bmp and im178__s.bmp to the COM PROFIBUS Bitmaps folder.

3. Update the local module catalog (menu command File"Scan GSD Files).

The station type IM 178-4 is then available in the slave family “Other”.

IM 178-4 C79000-G7076-C178-01

4-1

Parameter Assignment

Note

In slot 4, configure one of the proposed technology slots:

S Q4 words / I12 words:

Word consistency in the Q and I areas

S Q4 words / I12 words consistent (standard situation):

Word consistency in the Q area, consistency over the entire I area

If you only require the less significant 16 bits of the actual position value, you can also select “Q4 words / I12 words” .

Requirements for Parameter Assignment with a Parameter Assignment Frame

To assign parameters to the IM 178-4 using a parameter assignment frame, you must know how the configuration and parameter assignment frames are structured. This is explained in Appendix C.

Parameter Assignment

Each DP standard slave receives its parameters from the DP master when it starts up itself or when the master is started.

Successful parameter assignment is indicated by the value TRUE in the PARA status bit for each channel. A parameter assignment error is indicated by FALSE in the PARA status bit and an entry in the slave diagnostic data if this is enabled.

The diagnostic LED remains lit until both channels have been assigned error-free parameters.

Until parameter assignment is successful, the inputs for the actual position value and actual reference value have the value 0.

The parameters cannot be read back from the module.

4-2

C79000-G7076-C178-01

IM 178-4

4.2 GSx File

Definition: GSx File

A device database file (*.GSx where x = language identifier) contains all the parameters or properties specific to a particular slave. The format of the GSx file is stipulated in the standard EN 50170, Volume 2, PROFIBUS.

Uses of the GSx File

Configuration tools such as COM PROFIBUS can interpret the GSx file and provide you with a convenient method for configuring and assigning parameters to the IM 178-4.

You can download GSx files from the interface center in Fürth using a modem (telephone number ++94–911–737972).

Parameter Assignment

The Most Important Properties

If you do not have the GSE file available, the most important properties of the IM 178-4 are listed in the table below. This information is adequate to install and start up the IM 178-4 in conjunction with the CP 5431.

Property

Vendor ID Ident_Number 8064 FMS supported FMS_supp no

9.6 Kbps supported 9.6_supp yes

19.2 Kbps supported 19.2_supp yes

45.45 Kbps supported 45.45_supp yes

93.75 Kbps supported 93.75_supp yes

187.5 Kbps supported 187.5_supp yes 500 Kbps supported 500_supp yes

1.5 Mbps supported 1.5M_supp yes 3 Mbps supported 3M_supp yes 6 Mbps supported 6M_supp yes 12 Mbps supported 12M_supp yes FREEZE control command supported Freeze_Mode_supp yes SYNC control command supported Sync_Mode_supp yes Automatic transmission rate search

supported Software modification of PROFIBUS

address

DP Keyword as in

EN 50170, V olume 2,

PROFIBUS

Auto_Baud_supp yes

Set_Slave_Add_supp no

IM 178-4

IM 178-4 C79000-G7076-C178-01

4-3

Parameter Assignment

Property IM 178-4

DP Keyword as in

EN 50170, V olume 2,

PROFIBUS

Length of user-specific parameter

User_Prm_Data_Len 24 bytes

assignment data User–specific parameter assignment

data for the DP attachment (default) Minimum interval between two slave

User_Prm_Data 40H, 20H, 00H, ...

Min_Slave_Intervall 5 (0.5 ms)

polling cycles Modular station Modular_Station 1 Maximum number of modules Max_Module 4 Maximum number of inputs Max_Input_Len 24 bytes Maximum number of outputs Max_Output_Len 8 bytes Maximum number of inputs and

Max_Data_Len 32 bytes

outputs together Central display of vendor-specific

Unit_Diag_Bit not used

status and error messages Assignment of values in

Unit_Diag_Area not used

device-related diagnostic field to texts IDs of all modules of a modular DP

Module, End_Module yes

slave Assignment of vendor–specific error

Channel_Diag no types in the channel related diagnostic field to texts

For an explanation of the user–specific parameter assignment data (technological parameters) refer to Appendix C.

4-4

C79000-G7076-C178-01

IM 178-4

Preparing for Startup

5.1 Setting the PROFIBUS Address of the IM 178-4

Definition

Each node must be assigned a PROFIBUS address to identify it uniquely in the PROFIBUS DP network.

Rules

The following rules apply to the PROFIBUS address of the IM 178-4:

S The PROFIBUS addresses 0 to 125 are permitted. S The PROFIBUS address must only be assigned once on the bus.

IM 178-4 C79000-G7076-C178-01

5-1

Preparing for Startup

Setting the PROFIBUS Address

You set the PROFIBUS address using a screwdriver with the front panel open. The PROFIBUS address is the sum of the switches set to the right (position ”ON”).

IM 178-4

BUS ADDRESS

OFF ON

64 32 16

8 4 2 1

PROFIBUS address =

Figure 5-1 Setting the PROFIBUS Address

Changing the PROFIBUS Address

You can change the set PROFIBUS address at any time. The IM 178-4 only adopts the new PROFIBUS address after the 25 V power supply (1L+) has been switched off and on again.

+ 32

+ 2 + 1

= 99

5-2

C79000-G7076-C178-01

IM 178-4

5.2 Checklist of the Mechanical Construction

Table 5-1 Checklist of the Mechanical Construction

Preparing for Startup

Step

1 Installation of the IM 178-4 (see Chapter 2) 2 Wiring the IM 178-4 (see Chapter 3)

What needs to be done? 

S Digital inputs S Digital outputs S Analog outputs S Sensor connections S Power supplies

3 Peripheral connector

The peripheral connector must be locked and secured by screws. 4 Setting the DP address (see Section 5.1) 5 Bus connector

The bus connector must be secured by screws 6 Check the shields of the individual cables 7 Turn on the power supplies -

5.3 Checklist for Configuration/Parameter Assignment

T able 5-2 Checklist for Configuration/Parameter Assignment

Step

1 Have you copied the GSE file and the bitmap file to the local module

catalog? (see Section 4.1) 2 Does the PROFIBUS address set on the module match the configured

address? 3 Have you set the user-specific parameter assignment data for the DP

attachment to 40H, 20H, 00H? (see Section B.2.2) 4 Have you configured the technological slot depending on your requirements

to ”Q4 words/I12 words” or ”Q4 words/I12 words consistent”? (see Section

B.1) 5 Have you set the user-specific parameters to values suitable for the position

encoder being used?

IM 178-4 C79000-G7076-C178-01

What needs to be done? 

5-3

Preparing for Startup

5-4

C79000-G7076-C178-01

IM 178-4

Functions of the IM 178-4

6.1 Description of the Functions

6.1.1 Cyclic Processing

The user data area of the outputs is evaluated and the user data area of the inputs is updated cyclically (for the update rate, refer to Section A.1).

Detecting the Actual Position Value with Absolute Position Encoders

When using absolute position encoders (13, 21 or 25 bit frame), then depending on the parameter assignment, the sensor signals are sent and normalized via a selectable serial Gray/binary converter. By using the normalization function, you can shift out a selectable number of bits following the sensor values. Some sensors provide additional information in these subsequent bits, such as power error or to indicate that a limit value has been reached. If the absolute position encoder you are using supplies less bits than the selected frame contains, the following bits must either be masked out in your program or shifted out by normalization.

Gray code sensors whose frame does not begin with the MSB can only be used when all the preceding bits (special bits such as power error) always have the value 0.

The IM 178-4 enters the actual position value as a 32-bit value in the user data area of the inputs. If an SSI frame error occurs, the last correct actual position value is retained.

The Synchronization parameter is not evaluated.

IM 178-4 C79000-G7076-C178-01

6-1

Functions of the IM 178-4

Detecting the Actual Position Value With Incremental Sensors

The count pulses are always evaluated four times. If signal sequence A comes before signal sequence B, this means movement in a positive direction. You can invert the direction of movement by changing the parameter setting for the sensor type to ”Incremental Sensor Inverted”. If there is a line fault, sensor fault or zero mark error, the actual position value continues to be updated but is incorrect.

Apart from the cyclic updating of the actual position value, the IM 178-4 detects the current direction of movement and enters this in the status bit +/– of the user data area of the inputs.

The parameters Gray/binary converter, baud rate, monoflop time, normalization are not evaluated.

Analog Output

You specify the setpoint for the rotational speed as a 16–bit value: Bit 15 contains the sign, bits 14 to 2 contain the value, bits 0 and 1 are irrelevant.

Table 6-1 Range of Values of the Rotational Speed Setpoint

INT Value

0 to +32767 0 V to + FS

–1 to –32768 –1,2 mV to – FS

+30440 +10 V

For full scale (FS), approximately 10.763 V is set.

Detecting the Actual Reference Value

The actual reference value is detected as follows:

S Depending on the digital input I0 (corresponding control bit: REF0) or S With digital input I1 and the zero mark (corresponding control bit: REF1),

however only when using incremental sensors.

On the IM 178-4, both methods for detecting the actual reference value cannot be active at the same time. If you set the control bits REF0 and REF1 simultaneously in the user data area of the outputs; with an incremental encoder, the actual reference value detection is started with I1 and zero mark; with an absolute position encoder, the actual reference value detection is started with I0.

Once you have started detection of the actual reference value, you must complete this in a defined manner before the function can be started again. This is described below.

Corresponds to

6-2

C79000-G7076-C178-01

IM 178-4

Detecting the Actual Reference Value Dependent on I0

By setting parameters (edge selection I0), you decide when the actual reference value will be detected, as follows:

S On the falling edge of I0 S On the rising edge of I0 S On both edges of I0

The following mechanism is used to detect the actual reference value for each channel:

S You trigger the function by assigning the value TRUE to the REF0 control bit.

This is only possible when at this time the REF0_Q status bit has the value FALSE.

S The next time that the selected edge condition is satisfied by I0, the IM 178-4

generates the actual reference value and enters it in the user data area of the inputs. The module then sets the REF0_Q status bit of the corresponding channel.

Functions of the IM 178-4

S You can now evaluate the actual reference value and terminate detection of the

actual reference value by resetting the REF0 control bit.

S Following this, the module resets the REF0_Q status bit. Detection of the actual

reference value can now be started again.

Control bit REF0

Digital input I0

Status bit REF0_Q

Figure 6-1 Handshaking between the user program and IM 178-4 during actual reference

value detection with a rising edge at I0.

User requests actual reference value detection

IM 178-4 signals existence of the new actual reference value

User terminates actual reference value detection

IM 178-4 C79000-G7076-C178-01

6-3

Functions of the IM 178-4

Detecting the Actual Reference Value With I1 and Zero Mark

The actual reference value is detected on the rising edge of the first zero mark after a falling edge is detected at digital input I1. This type of actual reference value detection is only possible with incremental sensors.

The actual reference value is acquired using a mechanism analogous to that described above for I0. You start the function by setting the REF1 control bit. A new actual reference value exists when the IM 178-4 has set the REF1_Q status bit. If you reset the REF1 status bit, the module clears the REF1_Q status bit. Following this, detection of the actual reference value can be started again.

Synchronization

Synchronization means the resetting of the actual position value. This is only possible with incremental encoders. You specify the conditions for synchronization during parameter assignment.

The following synchronization conditions are possible:

S Trigger by software (setting the SYN control bit) S Rising edge of the zero mark S Rising edge of digital input I1 S Digital input I1 and zero mark (first rising edge of the zero mark after falling

edge at I1)

The mechanism for synchronization by the software is as follows:

S You start the function by assigning the value TRUE to the SYN control bit. S The IM 178-4 sets the SYN_Q status bit and performs the synchronization

(SYNC = 1).

S You complete synchronization by resetting the SYN control bit. S Following this, the module resets the SYN_Q status bit.

6-4

C79000-G7076-C178-01

IM 178-4

Control bit SYN

Functions of the IM 178-4

User terminates synchronization after detecting SYN_Q=1.

User requests

Status bit SYN_Q

status bit SYNC

Figure 6-2 Handshaking Between the User Program and IM 178-4 with Software

Synchronization

synchronization

If synchronization is started using the zero mark, I1, or zero mark and I1, the IM 178-4 does not monitor the SYN control bit for a rising edge, but for the value TRUE. If SYN has the value TRUE, then each time the synchronization condition occurs, the actual position value is reset and marked as synchronized (SYN status bit has the value TRUE). SYN_Q is not set.

This allows you, for example, to implement a rotary axis with incremental sensors.

6.1.2 Error Monitoring

Startup Tests

During its startup, the IM 178-4 tests the hardware. If a fault is detected, only the SF LED is lit (see Section 7.1) and the module does not change to normal operation.

Watchdog

Watchdog timers monitor the module functions. If a timeout occurs, the SF LED is lit (see Section 7.1) and the module stops normal functions. You can only clear this status by turning off the 24 V module power supply (1L+) and then turning it on again.

IM 178-4 C79000-G7076-C178-01

6-5

Functions of the IM 178-4

Monitoring Position Encoder Errors

If the parameter assignment is free of errors, the IM 178-4 monitors the connected position encoders. Any errors detected are indicated in the EXTF0, EXTF1 and EXTF2 status bits of each of the two channels. If you have enabled diagnostic interrupts, an external diagnostic message is also generated.

The mechanism for detecting and acknowledging an error is as follows: S The IM 178-4 detects a position encoder error and then sets the EXTF0,

EXTF1 or EXTF2 bit for the channel affected. This is only possible when none of the bits EXTF0, EXTF1, EXTF2 of the affected channel is set at the time when the error is detected and the group error acknowledgment EXTF_Q of the channel has the value FALSE.

S You can eliminate the indicated error and acknowledge it by assigning the value

TRUE to the EXTF_Q bit of the affected channel.

S The module then clears the EXTF0, EXTF1 or EXTF2 bit belonging to the

position encoder error. When resetting the bit, the module does not check whether the original position encoder error still exists nor whether another position encoder error has occurred for this channel.

S You assign the value FALSE to the EXTF_Q bit of the corresponding channel.

Following this, the module resumes error monitoring.

Status bit EXTF0

IM 178-4 detects position encoder error

Status bit EXTF_Q

LED SF lights up

Figure 6-3 Handshaking Between the IM 178-4 and User Program When a Position

Encoder Error Occurs (Example EXTF0)

6-6

If a position encoder error occurs, the SF LED is lit until the error is eliminated and you assign the value TRUE to the EXTF_Q bit of the affected channel.

If the error is eliminated in the Stop mode of the CPU (CLEAR mode), it does not need to be acknowledged.

C79000-G7076-C178-01

IM 178-4

Table 6-2 Overview of Position Encoder Errors

Functions of the IM 178-4

T ype of Error

Start/stop bit error Absolute posi-

Edge error Incremental

Sensor signal

cable error

Zero mark monito-

ring error

Sensors with

Which Error is

Possible

tion encoder (SSI)

sensor

Absolute position encoder (SSI) and incremental encoder

Incremental sensor

Possible Causes of the

Error

S Sensor cable not

connected

S Break on the sensor cable S Parameters on the

IM 178-4 do not match the connected sensor

S Sensor defective S Interference

Interference on the sensor cable

S Wire break S Cable not plugged in S Short–circuit between

wires, to ground or to sensor power supply

S Interference on the sensor

cable

S Sensor defective

Reaction of the

IM 178-4

S EXTF1 status

bit (sensor error) is set

S Last correct

actual value is retained

EXTF1 status bit (sensor error) is set

EXTF0 status bit (sensor signal cable error) is set

S EXTF2 status

bit (zero mark error) is set

S Synchroni-

zation is cleared, SYNC status bit is reset

Zero Mark Monitoring

Zero mark monitoring is only possible when using an incremental sensor with at least 4 increments (corresponds to 16 count pulses) per revolution. After assigning parameters to the IM 178-4, zero mark monitoring is only active after successful synchronization (synchronization condition rising edge of the zero mark or digital input I1 and zero mark).

IM 178-4 C79000-G7076-C178-01

6-7

Functions of the IM 178-4

pp(g

6.2 User Data Interface

Addresses

The inputs and outputs of the IM 178-4 are addressed starting at the input or output module base address.

Assignment of the User Data Area of the Outputs

Table 6-3 User Data Area of the Outputs

Byte

Bit Name or Value Meaning Data Format

Channel 0

0 0 0Q0 Digital output 0 BOOL

1 0Q1 Digital output 1 BOOL 2 0Q2 Digital output 2 BOOL 3 0 reserved 4 0 reserved 5 0 reserved 6 0 reserved 7 E0AO Enable analog output BOOL

1 0 REF1 Trigger actual reference value detection

with OI1 and zero mark

1 REF0 Trigger actual reference value detection

with 0I0 2 SYN Trigger synchronization BOOL 3 0 reserved 4 0 reserved 5 0 reserved 6 0 reserved 7 EXTF_Q Group error acknowledgment BOOL

2 Rotational speed setpoint (bit15: sign, bit 3

2 to 14: value, bit 0 and 1: irrelevant)

BOOL

INT

6-8

C79000-G7076-C178-01

IM 178-4

Functions of the IM 178-4

pp(g

Table 6-3 User Data Area of the Outputs

Byte Data FormatMeaningName or ValueBit

Channel 1

4 0 1Q0 Digital output 0 BOOL

1 1Q1 Digital output 1 BOOL 2 1Q2 Digital output 2 BOOL 3 0 reserved 4 0 reserved 5 0 reserved 6 0 reserved 7 E1AO Enable analog output BOOL

5 0 REF1 Trigger actual reference value detection

with 1I1 and zero mark

1 REF0 Trigger actual reference value detection

with 1I0 2 SYN Trigger synchronization BOOL 3 0 reserved 4 0 reserved 5 0 reserved 6 0 reserved 7 EXTF_Q Group error acknowledgment BOOL

6 Rotational speed setpoint (bit15: sign, bit 7

2 to 14: value, bit 0 and 1: irrelevant)

BOOL

INT

IM 178-4 C79000-G7076-C178-01

6-9

Functions of the IM 178-4

Assignment of the User Data Area of the Inputs

Table 6-4 User Data Area of the Inputs

Byte

Bit Name or Value Meaning Data Format

Channel 0

0 0 REF1_Q Acknowledgment for actual reference

value detection with 0I1 and zero mark

1 REF0_Q Acknowledgment for actual reference

value detection with 0I0 2 SYN_Q Acknowledgment for synchronization BOOL 3 0 reserved 4 +/– Direction of movement (0=negative di-

rection, 1=positive direction) 5 SYNC Actual value synchronized (only valid

after setting SYN) 6 P ARA Channel parameter assignment error–

free 7 – irrelevant

1 0 0I0 Digital input 0 BOOL

1 0I1 Digital input 1 BOOL 2 0I2 Digital input 2 BOOL 3 0 reserved 4 EXTF0 Sensor signal cable error 0 BOOL 5 EXTF1 Sensor error BOOL 6 EXTF2 Zero mark error BOOL 7 0 reserved

0000

3 4

reserved

BOOL

6 7 8

9 10 11

6-10

Actual position value Channel 0

Actual reference value Channel 0

C79000-G7076-C178-01

DINT

IM 178-4

Functions of the IM 178-4

Table 6-4 User Data Area of the Inputs

Byte Data FormatMeaningName or ValueBit

Channel 1

12 0 REF1_Q Acknowledgment for actual reference

value detection with 1I1 and zero mark

1 REF0_Q Acknowledgment for actual reference

value detection with 1I0 2 SYN_Q Acknowledgment for synchronization BOOL 3 0 reserved 4 +/– Direction of movement (0=negative di-

rection, 1=positive direction) 5 SYNC Actual value synchronized (only valid

after setting SYN) 6 P ARA Channel parameter assignment error–

free 7 – irrelevant

13 0 1I0 Digital input 0 BOOL

1 1I1 Digital input 1 BOOL 2 1I2 Digital input 2 BOOL 3 0 reserved 4 EXTF0 Sensor signal cable error 0 BOOL 5 EXTF1 Sensor error BOOL 6 EXTF2 Zero mark error BOOL 7 0 reserved

14 15

0000

reserved

16 17 18

Actual position value channel 1 DINT

19 20 21 22

Actual reference value channel 1 DINT

BOOL

IM 178-4 C79000-G7076-C178-01

6-11

Functions of the IM 178-4

6-12

C79000-G7076-C178-01

IM 178-4

Diagnostics

7.1 Status and Diagnostic LEDs

2 diagnostic LEDs (red) and 13 status LEDs (green) on the front panel of the module provide information about the state of the IM 178-4.

S The SF diagnostic LED (red, group error) basically indicates the status of the

hardware.

S The BF diagnostic LED (red, bus error) provides information about the

connection to PROFIBUS DP.

S The ON status LED (green) indicates that the module is ready for operation. S The status LEDs 0I0, 0I1, 0I2, 0Q0, 0Q1, 0Q2, 1I0, 1I1, 1I2, 1Q0, 1Q1, 1Q2

indicate the state of the digital inputs and outputs.

IM 178-4

Table 7-1 ON Status LED and Diagnostic LEDs on the IM 178-4

SF BF

LEDs Meaning Remedy

ON BF SF

* * The voltage is applied to the IM 178-4,

* The IM 178-4 has incorrect parameters

SF: red BF: red ON:green

Hardware defect on the IM 178-4. The module is defective and must be

the module has detected no hardware error.

– there is no data exchange between the DP master and IM 178-4.

Causes:

S Check the PROFIBUS address.

IM 178-4 C79000-G7076-C178-01

replaced. –

S Check the IM 178-4. S Check the configuration and

parameter assignment.

7-1

Diagnostics

Tabelle 7-1 ON Status LED and Diagnostic LEDs on the IM 178-4, continued

SF BF

LEDs Meaning Remedy

ON BF SF

* Transmission rate search or illegal

SF: red BF: red ON:green

PROFIBUS address Causes:

S The watchdog time has elapsed S Bus communication via PROFIBUS

DP to the IM 178-4 is interrupted

Set a valid PROFIBUS address (1 to

125) on the IM 178-4 or check the bus structure.

S Check whether the bus connector is

correctly plugged in.

S Check whether there is a break on

the LAN cable to the DP master.

S Turn the switch for 24 V DC on the

power supply module off and on again.

* External error on a channel or a

channel was not assigned error-free parameters.

Data exchange between the DP master and IM 178-4 is taking place.

Both channels are free of errors.

Check the peripherals of the channels, check the parameter assignment

–

Note relevant off lit flashing

Breakdown of Bus Communication

If there is a breakdown of communication on PROFIBUS DP, for example caused by the failure of the DP master, the digital outputs are deactivated (value 0 is output) and 0 V is applied to the analog outputs. The diagnostic LED BF is lit (see Table 7-1).

7-2

C79000-G7076-C178-01

IM 178-4

7.2 Diagnostic Data of the IM 178-4

Definition

Diagnostics is the detection and localization of errors. The structure of the diagnostic functions is specified in the standard EN 50170, Volume 2, PROFIBUS. The diagnostic functions of the IM 178-4 comply with the standard. The slave diagnostics of the IM 178-4 are explained in the following sections.

7.2.1 Structure of Slave Diagnostics

Structure of Slave Diagnostics

The diagnostic data of the IM 178-4 is a maximum of 29 bytes long and has the following structure:

Diagnostics

Availability

Table 7-2 Structure of Slave Diagnostics

Byte

0 Station status 1 Information about the DP slave 1 Station status 2 Additional information about the DP

2 Station status 3 reserved 3 Master PROFIBUS address Address of the parameter

4 High byte of the vendor ID 5 Low byte of the vendor ID

6 to 8 ID-related diagnostics

9 to max. 28 Device-related diagnostics

Assignment Description

slave

assignment master

The first 6 bytes of the slave diagnostic data are always available. The ID and device-related diagnostic data is only prepared by the IM 178-4 when

you have enabled the diagnostic interrupt in the parameter assignment.

IM 178-4 C79000-G7076-C178-01

7-3

Diagnostics

Diagnostics When Using an S7/M7 DP Master

Requesting slave diagnostics is particularly useful when you have enabled the diagnostic interrupt in the parameter assignment. If the IM 178-4 detects an error, it provides external diagnostic data if this has been selected in the parameter assignment.

You can request the slave diagnostic data using SFC13 “DPNRM_DG” (see

System and Standard Functions

reference manual).

7.2.2 Structure of the First 6 Bytes of the Slave Diagnostic Data

Structure of Station Status 1

Station status 1 provides information about the DP slave and has the following structure:

Table 7-3 Structure of Station Status 1 (Byte 0)

Bit Meaning Remedy

0 1: The DP slave cannot be

accessed by theDP master.

S Is the correct PROFIBUS

address set on the DP slave?

S Is the bus connector plugged in? S Voltage on the DP slave? S RS 485 repeater set correctly? S Reset the DP slave

1 1: The DP slave is not ready for

data exchange

2 1: The configuration data sent by

the DP master to the DP slave do not match the structure of the DP slave.

3 1: Device-related and/or ID-related

diagnostic data from the IM 178-4 exist.

4 1: The function is not supported, for

example modifying the PROFIBUS address with the software.

Wait, the DP slave is currently starting up.

Correct station type or correct structure of the DP slave entered in the configuration?

You can read out the diagnostic data.

Check the configuration.

7-4

5 1: The DP master cannot interpret

the response of the DP slave.

Check the physical properties of the bus.

C79000-G7076-C178-01

IM 178-4

Table 7-3 Structure of Station Status 1 (Byte 0)

Bit RemedyMeaning

Diagnostics

6 1: The DP slave type does not

match the software configuration.

7 1: The DP slave was assigned

parameters by a different DP master from the DP master currently accessing the DP slave.

Structure of Station Status 2

Station status 2 provides further information about the DP slave and has the following structure:

Table 7-4 Structure of Station Status 2 (Byte 1)

Bit

0 1: The DP slave must be reassigned parameters. 1 1: A diagnostic message exists. The DP slave cannot continue until the

error is cleared (static diagnostic message).

2 1: The bit is always set when a DP slave with this PROFIBUS address

exists. 3 1: The watchdog has responded. 4 1: The slave has received the “FREEZE” control command. 5 1: The DP slave has received the “SYNC” control command. 6 The bit is always reset. 7 1: The DP slave is deactivated, in other words it has been taken out of

the current processing.

Correct station type entered in the configuration?

This bit is always 1 if, for example, you are currently accessing the DP slave with the programming device or with a different DP master. The PROFIBUS address of the parameter assignment master is located in the diagnostic byte ”Master PROFIBUS Address”.

Meaning

The bit is only updated when a further diagnostic message also changes.

Structure of Station Status 3

Station status 3 is reserved and is not relevant for the diagnostics of a DP slave.

Master PROFIBUS Address

The master PROFIBUS address diagnostic byte contains the PROFIBUS address of the DP master that assigned parameters to the DP slave.

IM 178-4 C79000-G7076-C178-01

7-5

Diagnostics

Vendor ID

The vendor ID contains a code that describes the type of DP slave.

Table 7-5 Structure of the Vendor ID

Byte

4 80 5 64

Content

H H

7.2.3 Structure of the ID-Related and Device-Related Slave Diagnostic Data

ID-Related Diagnostic Data

On the IM 178-4, the ID-related diagnostic data is structured as follows:

Table 7-6 Structure of the ID-Related Diagnostic Data

Byte

6 43

7 00H or 08

8 00

Content Meaning

Code and length (including byte 6) of the ID-related diagnostic data

00H, is no error has occurred: 08H, if an error has occurred

reserved

Device-Related Diagnostic Data

The diagnostic data record DS 1 typical for SIMATIC S7 is entered in the device-related diagnostic data. The data records and diagnostic data are described for SIMATIC S7/M7 in the

Table 7-7 Structure of the Device-Related Diagnostic Data

Byte

9 14

10 01 11 4 Slot 4 12 00

13 to 28 Diagnostic data

The diagnostic data consists of a module-specific section (bytes 13 to 16) and a channel-specific section (bytes 17 to 28).

7-6

Content Meaning

System and Standard Functions

Code and length (including byte 9) of the device-related diagnostic data

Code for S7 diagnostics

reserved

reference manual.

C79000-G7076-C178-01

IM 178-4

Diagnostics

Table 7-8 Structure of the Module-Specific Section of the Diagnostic Data (1 means error)

Byte

13 0 Module fault

14 0..3 08H (ID for module class: FM)

15 0..7 00H (not used) 16 0 ..7 00H (not used) 17 0..6 74H (ID for channel type: FM-POS)

18 0..7 10H (number of diagnostic bits per channel) 19 0..7 02H (number of channels of same type)

20 0 Channel error channel 0

Bit Content/Meaning

1 Internal error 2 External error 3 Channel error exists 4 0 (not used) 5 0 (not used) 6 0 (not used) 7 0 (not used)

4 Channel information exists 5 0 (not used) 6 0 (not used) 7 0 (reserved)

7 0 (no further channel type exists)

Channel error vector

1 Channel error channel 1 2 0 (not used) 3 0 (not used) 4 0 (not used) 5 0 (not used) 6 0 (not used) 7 0 (not used)

IM 178-4 C79000-G7076-C178-01

7-7

Diagnostics

Table 7-9 Structure of the Channel-Specific Section of the Diagnostic Data (1 means

error)

Byte Bit Content/Meaning

Channel-specific error channel 0

21 0 Sensor signal cable error (corresponds to status bit EXTF0)

1 Sensor error (corresponds to status bit EXTF1) 2 Zero mark monitoring error (corresponds to status bit EXTF2) 3 0 (not used) 4 0 (not used) 5 0 (not used) 6 0 (not used) 7 0 (not used)

22 0 Incorrect parameter assignment *

1 0 (not used) 2 0 (not used) 3 0 (not used) 4 0 (not used) 5 0 (not used) 6 0 (not used) 7 0 (not used)

Channel-specific error channel 1

23 0 Sensor signal cable error (corresponds to status bit EXTF0)

1 Sensor error (corresponds to status bit EXTF1) 2 Zero mark monitoring error (corresponds to status bit EXTF2) 3 0 (not used) 4 0 (not used) 5 0 (not used) 6 0 (not used) 7 0 (not used)

24 0 Incorrect parameter assignment *

1 0 (not used) 2 0 (not used) 3 0 (not used) 4 0 (not used) 5 0 (not used) 6 0 (not used) 7 0 (not used)

7-8

C79000-G7076-C178-01

IM 178-4

Diagnostics

Table 7-9 Structure of the Channel-Specific Section of the Diagnostic Data (1 means

error)

Byte Content/MeaningBit

reserved 25 0..7 00H (reserved) 26 0..7 00H (reserved) 27 0..7 00H (reserved) 28 0..7 00H (reserved)

* For example incorrect sensor type or reserved values not 0 or normalization value too high.

IM 178-4 C79000-G7076-C178-01

7-9

Diagnostics

7-10

C79000-G7076-C178-01

IM 178-4

Technical Specifications

UL/CSA Approval

The following approvals exist for the IM 178-4: UL Recognition Mark

Underwriters Laboratories (UL) complying with Standard UL 508, File E 116536

CSA Certification Mark Canadian Standard Association (CSA) complying with Standard C 22.2 No. 142, File LR 48323

IM 178-4 C79000-G7076-C178-01

A-1

Technical Specifications

FM Approval

The FM approval exists for the S7-300: FM approval complying with Factory Mutual Approval Standard Class Number 3611, Class I, Division 2, Group A, B, C, D.

Warning

Personal injury and damage to property are possible.

Warning

WARNING - DO NOT DISCONNECT WHILE CIRCUIT IS LIVE UNLESS LOCATION IS KNOWN TO BE NONHAZARDOUS

CE Approval

Our products meet the requirements and aims of the following EU directives and are in accordance with the harmonized European standards (EN) published in the official documentation of the European Union for programmable logic controllers, as follows:

S 89/336/EEC “Electromagnetic Compatibility” (EMC directive) S 73/23/EEC ”Electrical Equipment for Use within Certain Voltage Limits”

In accordance with the directives listed above, the EU conformity certificates are kept for the relevant authorities at the following address:

Application

SIMATIC products are designed for use in an industrial environment.

(extra-low voltage directive)

Siemens Aktiengesellschaft Bereich Automatisierungstechnik A&D AS E 48 Postfach 1963 D-92209 Amberg

Application Requirements for

Noise emission Noise immunity

Industry EN 50081-2 : 1993 EN 50082-2 : 1995

A-2

C79000-G7076-C178-01

IM 178-4

Adherence to Installation Instructions

SIMATIC products meet the requirements providing you adhere to the installation and start up instructions in the manuals during installation and operation.

General Technical Specifications

General technical specifications are as follows:

S Electromagnetic compatibility S Transport and storage conditions S Mechanical and environmental conditions S Information about isolation tests, class of protection and degree of protection.

The general technical specifications include standards and test values with which the S7-300 complies and meets or indicates the test criteria with which the S7-300 was tested. The general technical specifications can be found in the manual

S7-300 Programmable Controller, Hardware and Installation, CPU Data

Technical Specifications

IM 178-4 C79000-G7076-C178-01

A-3

Technical Specifications

A.1 Technical Data of the IM 178-4

Dimensions and Weight

Dimensions W x H x D (mm)

Weight approx. 460 g

V oltages, Currents, Potentials

Auxiliary voltage 1L+/M

S Range S Reverse polarity

protection

S Electrical isolation

Load voltage 2L+/2M

S Range S Reverse polarity

protection

S Electrical isolation

Sensor power supply 5.2 V

S Output voltage S Output current

Sensor power supply 24 V

S Output voltage S Output current

Current consumption

S from 1L+ (no load) S from 2L+ (no load)

Power dissipation of the module

Status, Interrupts, Diagnostics

Status display yes, 13 green LEDs

Diagnostic functions

80 x125 x120

1L+

20.4 to 28.8 V

yes from DP interface and 2L+/2M 2L+

20.4 to 28.8 V no

yes, from DP interface and 1L+/M

5.2 V ±5% max. 600 mA,

short-circuit proof

1L+ – 0.8 V max. 500 mA,

short-circuit proof

approx. 135 mA approx. 5 mA approx. 7 W

for Status yes

S Fault display on module

for group fault

S Fault display on module

for bus fault

S Diagnostic information

readable

yes, red LED yes, red LED yes

Specifications of the Inputs and Outputs

Sensor inputs Position detection Signal voltages

Data transfer rate and cable length for absolute position encoders (shielded)

incremental1), absolute

symmetrical inputs: 5 V to RS 422

S at 125 kHz

max. 320 m

S at 250 kHz

max. 160 m

S at 500 kHz

max. 60 m

S at 1 MHz

max. 20 m

Input frequency and cable length for incremental encoders with 5 V supply (shielded)

Input frequency and cable length for incremental encoders with 24 V supply (shielded)

Input signals

S incremental

S absolute

max. 1 MHz at 32 m

max. 1 MHz at 100 m

2 pulse trains, 90 ° shift, 1 zero pulse

SSI frame

A-4

C79000-G7076-C178-01

IM 178-4

Technical Specifications

Digital inputs

S Input voltage

S Input current

S input delay of 0I0, 1I0

S Input delay of 0I1, 0I2,

1I1, 1I2

S Electrical isolation

S Cable length shielded S Coincidence factor

with horizontal installation with vertical installation

S Status display

0 signal: – 3 to + 5 V; 1 signal: 11 V to

30.2 V 0 signal: v 2 mA

1 signal: 9 mA (typical)

max. 50 ms typical 3 ms

yes, from DP interface and sensor signals

100 m

up to 40 ° C: 100% up to 60 ° C: 100% up to 40 ° C: 100% yes, green LED

Digital outputs

S Output current

S Coincidence factor S Status display S Output delay S Signal level for 1 signal S Activation of a standard

digital input

S Activation of a fast

digital input

S Short-circuit proof S Limitation of inductive

circuit interruption voltage

S Switching rate

S Aggregate current of all

digital outputs with horizontal installation

S Aggregate current of all

digital outputs with vertical installation

S Cable length unshielded S Cable length shielded S Electrical isolation

Analog outputs Load resistance in nominal range of output Resolution (incl. overload range):

Conversion time: Total deviation (related to nominal output range):

0 signal: 0.5 mA; 1 signal: 0.5 A (permitted range 5 mA to 0.6 A) Lamp load max. 5 W

100% yes, green LED typical 300 ms 2L+ – 0.8 V yes

yes 2L+ –39 V (typical)

resistive load max. 500 Hz inductive load max.

0.5 Hz up to 40° C: 3A

up to 60 ° C: 3A

up to 40° C: 3A

100 m 600 m yes, for DP interface and sensor signals

min. 1kΩ ±10 V 14 bits

The voltage is not regulated. 300 ms

±1,5%

IM 178-4 C79000-G7076-C178-01

A-5

Technical Specifications

Unsharpness of actual position value Minimum unsharpness

Maximum unsharpness

Frame time of the sensor

S 125 kHz S 250 kHz S 500 kHz S 1 MHz

Monoflop time Update rate

(cycle time)

Frame time + 130 ms (2 x frame time) + monoflop time + 430 ms 13 bit 21 bit 25 bit

112m s 176 ms 208 ms 56 ms 88 ms 104 ms 28 ms 44 ms 52 ms 14 ms 22 ms 26 ms

16 ms, 32 ms, 48 ms, 64 ms Evaluation of the control signals and generation of the status values every 300 ms

1) When using incremental encoders without a zero mark, the two signals N and N to different potential (5.2 V DC / M) externally.

2) For 0I0 and 1I0, a shielded cable must be used.

3) Age of sensor values depends on transmission technique and processing.

4) Sensors with a monoflop time longer than 64 ms cannot be used with the IM178-4. The time 2 x (1/baud rate) must be added to the specified values.

must be connected

A-6

C79000-G7076-C178-01

IM 178-4

Configuration and Parameter Assignment Frame for the IM 178-4

With STEP 7

If you configure and assign parameters to the IM 178-4 with STEP 7, you do not require the information contained in this appendix.

With COM PROFIBUS

If you configure and assign parameters to the IM 178-4 with COM PROFIBUS, you do not require the information in this appendix.

Configuration/Parameter Assignment

If you want to configure the IM 178-4 using a configuration frame and assign parameters to it with a parameter assignment frame, (for example with the CP 5431 as DP master), you require the information about the structure of the configuration and parameter assignment frames in the following sections.

B.1 Structure of the Configuration Frame

Structure of the Configuration Frame

The configuration frame has a length of 20 bytes. It is structured as follows:

Table B-1 Structure of the Configuration Frame

Slot

n n + 1 n + 2 n + 3 n + 4

1. Slot (unchangeable) (n = 0) 04 00 00 AD C4

2. Slot (unchangeable) (n = 5) 04 00 00 8B 41

3. Slot (unchangeable) (n = 10) 04 00 00 8F C0

4. Slot (unchangeable) (n = 15) C2 43

1) I/O output area: 4 words, word consistency

2) I/O input area: 12 words, either word consistency (4B Regardless of the consistency setting, the IM 178-4 always transfers the entire I/O area consistently in the configuration frame. The information in byte n+2 is only relevant for the DP master or for your configuration tool.

IM 178-4 C79000-G7076-C178-01

) or consistency of the entire range (CBH).

Byte

4B or

18 C0

B-1

Configuration and Parameter Assignment Frame for the IM 178-4

B.2 Structure of the Parameter Assignment Frame

Definition: Parameter assignment frame

The parameter assignment frame contains all the values that can be assigned to a DP slave.

The length of the parameter assignment frame of the IM 178-4 is 31 bytes.

Structure of the Parameter Assignment Frame

Standard section (Bytes 0 to 6) see Section B.2.1 Parameters for the DP attachment (Bytes 7 to 9) see Section B.2.2

Technological Parameters

see Section B.2.3see Section B.2.3

Figure B-1 Structure of the Parameter Assignment Frame for the IM 178-4

B.2.1 Standard Section of the Parameter Assignment Frame

Standard Section

The first 7 bytes of the parameter assignment frame are standardized according to EN 50170 and have the following content for the IM 178-4:

Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Vendor ID, low byte

Figure B-2 Standard Section of the Parameter Assignment Frame

38 01 06 0B 80 64 00

H H H

H H H H

Station status WD Factor 1 WD Factor 2 T

RDY

Vendor ID, high byte

Group IDByte 6

B-2

C79000-G7076-C178-01

IM 178-4

Configuration and Parameter Assignment Frame for the IM 178-4

B.2.2 Parameters for the DP Attachment

Structure of the Parameters for the DP Attachment

The length of the parameters for the DP attachment is 3 bytes. The default values of these parameters are 40H, 20H, 00H.

The parameters have the following meaning:

Bit no.

Start bit monitoring 0: on 1: off

Stop bit monitoring 0: on 1: off

Watchdog base 0: 10 ms (other DP master 1: 1 ms (S7/M7 DP master)

Enable diagnostic interrupt

Figure B-3 Parameters for the DP Attachment

IM 178-4 C79000-G7076-C178-01

B-3

Configuration and Parameter Assignment Frame for the IM 178-4

B.2.3 Technological Parameters

Structure of the Technological Parameters

The length of the technological parameters is 21 bytes. The parameters are structured as follows:

Table B-2 Technological Parameters

Byte

Bit Default

What can be assigned Meaning of the bits

Value

10 15 11 5F 12 04 13 00 14 10

H H H H H

Constant Constant Constant Constant Constant

15 0..6 0000000 reserved

7 1 Diagnostic interrupt 0=disable

16 00

17 0..2 100

reserved

Sensor type

3 1 With sensor type 1 to 3: Gray/

binary convertor

4..5 00 With sensor type 1 to 3: b

rate

6..7 00 With sensor type 0 to 3:

monoflop time

The duration of two shift clock periods must be added to the monoflop times. At a baud rate of 125 kHz, this is 16 µs.

Constants

Module-specific parameters

Parameters for channel 0

aud

1=enable

000=none 001=SSI 13-bit 010=SSI 21-bit 011=SSI 25-bit 100=incremental sensor 101=incremental sensor inverted

0=off 1=on

00=125 kHz 01=250 kHz 10=500 kHz 11=1 MHz

00=16 µs 01=32 µs 10=48 µs 11=64 µs

B-4

C79000-G7076-C178-01

IM 178-4

Configuration and Parameter Assignment Frame for the IM 178-4

Table B-2 Technological Parameters

Byte Meaning of the bitsWhat can be assignedDefault

Bit

Value

18 0..3 0

4..5 00 With sensor type 4 and 5:

6..7 00 With actual reference value

19 00 20 00

H H

21 0..2 100

3 1 With sensor type 1 to 3:

4..5 00 With sensor type 1 to 3:

6..7 00 With sensor type 0 to 3:

With sensor type 1 to 3:

normalization

synchronization

generation via 0I0:

condition

Edge se-

lection 0I0

reserved reserved

Parameters for channel 1

Sensor type

Gray/

binary convertor

baud

rate

monoflop time

The duration of two shift clock periods must be added to the monoflop times. At a baud rate of 125 kHz, this is 16 µs. The connected position encoder (refer to the manufacturers information) must have a Monoflop time shorter than the time set here.

Number of places by which the sensor value is shifted right before it is entered in the user data area (possible values with an SSI 13-bit position encoder: 0 to 9; otherwise 0 to 15)

00=software 01=zero mark 10=digital input 0I1 11=digital input 0I1 and zero mark

00=none 01=falling edge at 0I0 10=rising edge at 0I0 11=both edges of 0I0

000=none 001=SSI 13-bit 010=SSI 21-bit 011=SSI 25-bit 100=incremental sensor 101=incremental sensor inverted

0=off 1=on

00=125 kHz 01=250 kHz 10=500 kHz 11=1 MHz

00=16 µs 01=32 µs 10=48 µs 11=64 µs

IM 178-4 C79000-G7076-C178-01

B-5

Configuration and Parameter Assignment Frame for the IM 178-4

Table B-2 Technological Parameters

Byte Meaning of the bitsWhat can be assignedDefault

Bit

Value

22 0..3 0

4..5 00 With sensor type 4 and 5:

6..7 00 With actual reference value

23 00 24 00

25 00 26 00 27 00 28 00 29 00 30 00

H H

H H H H H H

With sensor type 1 to 3:

normalization

synchronization

generation via 1I0:

condition

edge

selection 1I0

reserved reserved

Reserve reserved reserved reserved reserved reserved reserved

Number of places by which the sensor value is shifted right before it is entered in the user data area (possible values with an SSI 13-bit position encoder: 0 to 9; otherwise: 0 to 15)

00=software 01=zero mark 10=digital input 1I1 11=digital input 1I1 and zero mark

00=none 01=falling edge of 1I0 10=rising edge of 1I0 11=both edges of 1I0

B-6

C79000-G7076-C178-01

IM 178-4

Glossary

Aggregate current

The total current of all output channels of a digital output module.

Bus

This is a common transmission path connecting all nodes and having two defined ends.

With the IM 178-4, the bus is a twisted pair cable or fiber-optic cable.

Bus connector

The physical connection between the node and the LAN cable. For the IM 178-4, there are bus connectors with and without attachments for

PG/PC and in the types of protection IP 20 and IP 65.

Bus Segment ³ Segment

Chassis

Chassis includes all the inactive parts of electrical equipment that are connected together and that cannot carry a dangerous voltage even if a fault occurs.

IM 178-4 C79000-G7076-C178-01

Glossary-1

Glossary

Distributed I/Os

are input/output units that are not used in the central rack, but are distributed at a distance from the CPU, for example:

S IM 178-4 S ET 200M, ET 200B, ET 200C, ET 200U S DP/AS-I Link S S5-95U with PROFIBUS DP slave interface S Other DP slaves from Siemens or other vendors

The distributed I/Os are connected to the DP master via PROFIBUS DP.

Diagnostics

Diagnostics involves the detection, localization, classification, display, further evaluation of errors, faults and messages.

Diagnostics includes monitoring functions that are executed automatically while the system is operating. This increases the availability of systems by reducing the installation times and down times.

DP master

A ³ master that behaves according to the standard EN 50170, Volume 2, PROFIBUS is known as a DP master.

DP standard

is the bus protocol of the IM 178-4 complying with the standard EN 50170, Volume 2, PROFIBUS.

DP slave

A ³ slave created on PROFIBUS with the PROFIBUS DP protocol and that behaves according to the standard EN 50170, Volume 2, PROFIBUS, is known as a DP slave.

Equipotential bonding

Glossary-2

Electrical connection (equipotential bonding conductor) that brings the bodies of electrical equipment and external conductive bodies to the same or practically the same potential to prevent interfering or dangerous voltages rising between these bodies.

C79000-G7076-C178-01

IM 178-4

Floating

FREEZE

Glossary

With floating input/output modules, the reference potentials of the control and load circuits are electrically isolated, for example using optocouplers or relay contacts. Input/output circuits can be connected to common potential.

is a control command of the DP master to a group of DP slaves. After receiving the FREEZE control command, the DP slave freezes the current

state of the inputs and transfers this status to the DP master cyclically. Following each new FREEZE control command, the DP slave freezes the state

of its inputs again. The input data are only transferred cyclically by the DP slave to the DP master

again when the DP master sends the UNFREEZE control command.

Functional ground

Grounding that only serves to ensure the intended function of the electrical equipment. With functional grounding, spurious voltages are short-circuited that would otherwise have an unacceptable influence on the equipment.

Ground

The conductive ground area whose electrical potential can be set to zero at any point.

In the area of grounding electrodes, the ground area can have a potential other than zero. In this case, the term ”Reference Ground” is often used.

Grounding

Grounding means connecting an electrically conductive part via a grounding system to the grounding electrode.

IP 20

Degree of protection complying with DIN 40050: This provides protection against contact with fingers and against the penetration of foreign bodies with a diameter greater than 12 mm.

IM 178-4 C79000-G7076-C178-01

Glossary-3

Glossary

Load power supply

Power supply for supplying signal and function modules and the process I/Os connected to them.

Master

When a master has the token, it is permitted to send data to other nodes and to request data from other nodes (= active node).

³ DP masters are, for example, the CPU 416-2 DP, the CPU 414-2 DP, the CPU 315-2 DP or the IM 308-C.

Master-slave mechanism

Bus access mechanism with which only one node is the³ DP master and all other nodes are ³ DP slaves.

Node

Device that sends, receives or repeats data sent via the bus, for example DP master, DP slave, RS 485 repeater, active star coupler.

Non-floating

With non-floating input/output modules, the reference potentials of the control and load circuits are electrically connected.

Parameter assignment

Parameter assignment involves the setting of the behavior of the module.

Parameter assignment master

Each DP slave has one parameter assignment master. During startup, the parameter assignment master transfers the parameter data to the DP slave. This master can read and write the DP slave and is also permitted to modify the configuration of a DP slave.

Glossary-4

C79000-G7076-C178-01

IM 178-4

PROFIBUS

PROcess FIeld BUS, German process and fieldbus standard as specified in the PROFIBUS standard (EN 50170). This specifies functional, electrical and mechanical properties for a bit-serial fieldbus system.

PROFIBUS is a bus system that networks PROFIBUS-compatible programmable controllers and field devices at the cell and field level. PROFIBUS exists with the DP (= Distributed Peripheral I/O), FMS (= Fieldbus Message Specification) or TF (= Technological Functions) protocols.

PROFIBUS address

Each node must be assigned a PROFIBUS address to identify uniquely in PROFIBUS DP.

PCs/programming devices or the ET 200 handheld device have PROFIBUS address ”0”.

DP masters and DP slaves have a PROFIBUS address in the range 1 to 125.

Glossary

PROFIBUS DP

PROFIBUS bus system with the DP protocol. DP stands for Distributed Peripheral I/Os. The IM 178-4 is based on the standard EN 50 170, Volume 2, PROFIBUS.

Programming device

Programming devices (PGs) are basically personal computers designed for use in industry. They are particularly compact and can be transported. Programming devices are characterized by a special hardware and software design intended for use in conjunction with SIMATIC programmable logic controllers.

Reference potential

Potential starting from which the voltages of the circuits involved are referred and/or measured.

Segment

The LAN cable between two terminating resistors forms a segment. A segment contains 0 to 32 ³ nodes. Segments can be interconnected using RS 485 repeaters.

IM 178-4 C79000-G7076-C178-01

Glossary-5

Glossary

Slave

SYNC

A slave can only exchange data with a ³ master after it has been polled by the master.

Slaves are for example all DP slaves such as the IM 178-4, ET 200B, ET 200C, ET 200M etc.

is a control command from the DP masters to a group of DP slaves. With the SYNC control command, the DP master instructs the DP slave to freeze

the states of the outputs at the currently set value. With subsequent frames, the DP slave saves the output data but the states of the outputs remain unchanged.

After each new SYNC control command, the DP slave sets the outputs that it saved as output data.

The outputs are only updated cyclically again when the DP master sends the UNSYNC control command.

Transmission rate

The transmission rate is the speed at which data is transferred and is specified as the number of bits transferred per second (baud rate = bit rate).

On the IM 178-4, transmission rates 9.6 Kbps to 12 Mbps are possible.

Terminating resistor

is a resistor for balancing power on the bus cable; terminating resistors are always required at the end of the cable or segment.

On the IM 178-4, the terminating resistors are activated or deactivated in the ³ bus connector.

Version

All products with a order number have a version; this indicates the version of the product. The version is incremented when upwards compatible functions are extended, when modifications are due to production (use of new components) or when errors are eliminated.

Watchdog

Glossary-6

is a slave parameter. If a DP slave is not addressed within the watchdog time, it changes to a safe status, in other words the DP slave sets its outputs to ”0”.

C79000-G7076-C178-01

IM 178-4

Index

24 V power supply, 3-4

Aggregate current, Glossary-1 Analog output, 6-2 Analog outputs, 3-5 Assigning parameters, with DP master, B-1

Bus, Glossary-1 Bus connector, 3-8, Glossary-1

attaching the LAN cable, 3-9 connecting, 3-10 connecting to module, 3-10

setting the terminating resistor, 3-10 Bus node, Glossary-4 Bus segment, Glossary-1

Chassis, Glossary-1 Configuration frame, B-1

structure, B-1 Count signals, cables, 3-6 Cyclic processing, 6-1

Detecting the actual position value with

absolute position encoders, 6-1 Detecting the actual position value with

incremental sensors, 6-2 Detecting the actual reference value, 6-2 Detecting the actual reference value

dependent on I0, 6-3

Detecting the actual reference value with I1

and zero mark, 6-4 Device database file, 4-3 Device–related diagnostic data, structure,

7-6–7-10 Diagnostic data, 7-3 Diagnostics, Glossary-2 Digital inputs, cables, 3-6 Digital inputs I0 to I2, 3-5 Digital outputs Q0 to Q2, 3-5 Distributed I/Os, Glossary-2 DP master, Glossary-2 DP slave, Glossary-2 DP standard, Glossary-2

Equipotential bonding, Glossary-2 Error monitoring, 6-5

Fields of application of the IM 178–4, 1-2 Floating, Glossary-3 FM 354DPS, 4-3 FREEZE, Glossary-3 Front connector, 1-3, 3-1

pinout, 3-2

wiring, 3-6–3-9 Functional ground, Glossary-3 Functions of the IM 178–4, 6-1

Ground, Glossary-3 Grounding, Glossary-3 GSx file, 4-3

properties, 4-3–4-5

uses, 4-3

IM 178-4 C79000-G7076-C178-01

Index-1

Index

Hardware, 1-3

ID–related diagnostic data, structure, 7-6 Installation, procedure, 2-1 IP 20, Glossary-3

LAN cable, attaching, 3-9–3-11 LAN cable attachment, to bus connector with

order number 6ES7 ..., 3-9

Load power supply , Glossary-4

Master, Glossary-4 Master–slave mechanism, Glossary-4 Mechanical construction, 5-3

node, Glossary-4 Non–floating, Glossary-4

Parameter assignment, 4-2, Glossary-4 Parameter assignment frame, B-1, B-2

standard section, B-2

structure, B-2 Parameter assignment master, Glossary-4 Parameter assignment with COM PROFIBUS,

requirements, 4-1 Parameter assignment with Hardware

Configuration, requirements, 4-1 Parameter assignment with parameter

assignment frame, requirements, 4-2 Parameters

for the DP attachment, B-3

technological, B-4 Parameters for the DP attachment, structure,

B-3 Position encoder, monitoring errors, 6-6–6-8 PROFIBUS, Glossary-5

PROFIBUS address, 5-1, Glossary-5

changing, 5-2 rules, 5-1

setting, 5-2 PROFIBUS DP, Glossary-5 Programming device, Glossary-5

Reference potential, Glossary-5 Removing the module, procedure, 2-2 Replacing the module, procedure, 2-2

Safety rules, 2-1 Segment, Glossary-5 Sensor pins, 3-4 Sensor power supplies, 5.2 V and 24 V, 3-4 Shield contact element, 3-6 Slave, Glossary-6 Slave diagnostics

availability, 7-3

diagnostics when using an S7/M7 DP

master, 7-4 structure, 7-3 structure of the first 6 bytes, 7-4

Startup tests, 6-5 Station status 1, 7-4 Station status 2, 7-5 Station status 3, 7-5 Status and Diagnostic LEDs, 1-4 Status and diagnostic LEDs, 7-1–7-3 SYNC, Glossary-6 Synchronization, 6-4

Technical specifications, A-1 Technological parameters, B-4

structure, B-4–B-7

Terminating resistor, Glossary-6

bus connector with order number 6ES7 ...,

3-10

Transmission rate, Glossary-6

Index-2

C79000-G7076-C178-01

IM 178-4

Index

User data interface, 6-8

addresses, 6-8 assignment for outputs, 6-8–6-10 assignment of the inputs, 6-10–6-12

Version, Glossary-6

Watchdog, 6-5, Glossary-6

Zero mark monitoring, 6-7

IM 178-4 C79000-G7076-C178-01

Index-3

Index

Index-4

C79000-G7076-C178-01

IM 178-4

Siemens AG A&D AS E46

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IM 178-4 C79000-G7076-C178-01

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C79000-G7076-C178-01

IM 178-4

Siemens SIMATIC IM 178-4 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

Contents

Product Overview

1.1 What Can the IM 178-4 Do?

1.2 Fields of Application of the IM 178-4

1.3 The Hardware of the IM 178-4

Installing and Removing the Module

Wiring

3.1 Pinout of the Front Connector

3.2 Description of the Individual Pins (Notes, Explanations)

3.3 Wiring the Front Connector

3.4 Wiring and Connecting the Bus Connector

Parameter Assignment

4.1 Methods of Assigning Parameters to the IM 178-4

4.2 GSx File

Preparing for Startup

5.1 Setting the PROFIBUS Address of the IM 178-4

5.2 Checklist of the Mechanical Construction

5.3 Checklist for Configuration/Parameter Assignment

Functions of the IM 178-4

6.1 Description of the Functions

6.1.1 Cyclic Processing

6.1.2 Error Monitoring

6.2 User Data Interface

Diagnostics

7.1 Status and Diagnostic LEDs

7.2 Diagnostic Data of the IM 178-4

7.2.1 Structure of Slave Diagnostics

7.2.2 Structure of the First 6 Bytes of the Slave Diagnostic Data

7.2.3 Structure of the ID-Related and Device-Related Slave Diagnostic Data

A.1 Technical Data of the IM 178-4

B.1 Structure of the Configuration Frame

B.2 Structure of the Parameter Assignment Frame

B.2.1 Standard Section of the Parameter Assignment Frame

B.2.2 Parameters for the DP Attachment

B.2.3 Technological Parameters

Glossary

Index