Omron WS02-9094G - V1.0 User manual

Cat. No. W05E-EN-01 Note: Specifications subject to change without notice.
WS02-9094G CX-PROFIBUS Ver. 1.0 OPERATION MANUALCat. No. W05E-EN-01
OPERATION MANUAL
CX-PROFIBUS Ver. 1.0
WS02-9094G
Cat. No. W05E-EN-01
Authorised Distributor:
Printed in Europe
W409-E2-03+CS(CJ)1W-PRM21+OperManual.qxd 21.07.2005 16:28 Seite 1

SYSMAC
WS02-9094G
CX-PROFIBUS Ver.1.0
Operation Manual
Produced July 5, 2005

iv

v
Notice:
OMRON products are manufactured for use by a trained operator and only for the purposes described
in this manual.
The following conventions are used to classify and explain the precautions in this manual. Always
heed the information provided with them.
!DANGER Indicates information that, if not heeded, is likely to result in serious injury or loss of life.
!WARNING Indicates information that, if not heeded, could possibly result in serious injury or loss of
life.
!Caution Indicates information that, if not heeded, could possibly result in minor or relatively serious
injury, damage to the product or faulty operation.
OMRON Product References
All OMRON products are capitalized in this manual. The first letter of the word Unit is also capitalized
when it refers to an OMRON product, regardless of whether it appears in the proper name of the prod-
uct.
The abbreviation Ch appears in some displays and on some OMRON products. It often means word
and is abbreviated as Wd in the documentation.
The abbreviation PLC means Programmable Logic Controller.
Visual Aids
The following headings appear in the left column of the manual to help you locate different types of
information.
Note Indicates information of particular interest for efficient and convenient opera-
tion of the product.
1, 2, 3...Indicates various lists such as procedures, checklists etc.

vi
Trademarks and Copyrights
PROFIBUS, PROFIBUS FMS, PROFIBUS DP, PROFIBUS DP-V1, and PROFIBUS PA are trade-
marks of PROFIBUS International.
Microsoft, Windows, Windows NT, Windows 2000, Windows XP, Windows Explorer and ActiveX are
trademarks of Microsoft Corporation.
Sycon and CIF are trademarks of Hilscher GmbH.
Other product names and company names in this manual are trademarks or registered trademarks of
their respective companies.
The copyright of the PROFIBUS Master Units belongs to OMRON Corporation.
OMRON, 2005
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form, o
r
by any means, mechanical, electronic, photocopying, recording, or otherwise, without the prior written permission o
f
OMRON.
No patent liability is assumed with respect to the use of the information contained herein. Moreover, because OMRON is con-
stantly striving to improve its high-quality products, the information contained in this manual is subject to change without
notice. Every precaution has been taken in the preparation of this manual. Nevertheless, OMRON assumes no responsibility
for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained in
this publication.

vii
TABLE OF CONTENTS
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
3 Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
5 Application Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv
6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
SECTION 1
Features and Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1-1 Overview of PROFIBUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1-2 Setting up a PROFIBUS DP Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-3 CX-Profibus Configurator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
SECTION 2
Configuration Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2-1 Installation Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2-2 CX-Profibus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2-3 CS1/CJ1W-PRM21 PROFIBUS Master DTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2-4 C200HW-PRM21 PROFIBUS Master DTM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
2-5 Generic Slave Device DTM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
SECTION 3
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
3-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
3-2 Setting up a network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
3-3 Configuring the Slave Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
3-4 Configuring the Master . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
3-5 I/O Communication Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
3-6 Operating the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
3-7 Monitoring the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
SECTION 4
Troubleshooting and Maintenance . . . . . . . . . . . . . . . . . . . . 113
4-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
4-2 Troubleshooting the Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
4-3 Troubleshooting Using the Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Appendices
A Configurator Error and Warning Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

viii
TABLE OF CONTENTS
Index. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137

ix
About this Manual
This manual describes the CX-Profibus Configurator for the CS1W-PRM21 and CJ1W-PRM21
PROFIBUS DP and PROFIBUS DP-V1 Master Units.
This manual describes CX-Profibus and the PROFIBUS Master and slave DTM supplied with it. how to
operate it. These software components are required to control and operate the CS1/CJ1W-PRM21
PROFIBUS DP and PROFIBUS DP-V1 Master units. or more information on the CS1/CJ1W-PRM21
Master unit, refer to the CS1/CJ1W-PRM21 PROFIBUS Master Units Operation Manual (W409-E2-@).
Please read this manual carefully so that you understand the information provided before using CX-
Profibus and the PROFIBUS Master Units. Start with the precautions in the following section. They
describe the operating environment and application safety measures which must be observed prior to
and when using the PROFIBUS Master Unit.
The sections of this manual are as follows:
Section 1 introduces PROFIBUS and Cx-Profibus.
Section 2 describes Cx-Profibus and the DTMs in detail.
Section 3 describes the operational aspects of CX-Profibus.
Section 4 provides procedures for troubleshooting the PROFIBUS network and the Units.
The Appendices contain information supplementary to the information in the main body of the man-
ual. They are referred to in the various sections as required.
Manual Products Contents Cat. No.
CS-series
Programmable Controllers
Operation Manual
SYSMAC CS-series
CS1G/H-CPU@@-E
Describes the installation and operation of
the CS-series PLCs.
W339-E1-@
CJ-series
Programmable controllers
operation Manual
SYSMAC CJ-series
CJ1G-CPU@@
Describes the installation and operation of
the CJ-series PLCs.
W393-E1-@
CS/CJ-series
Programmable Controllers
Programming Manual
SYSMAC CS/CJ-series
CS1G/H-CPU@@-E, CJ1G-
CPU@@
Describes the ladder diagram programming
instructions supported by CS/CJ-series
PLCs.
W394-E1-@
CS/CJ-series
Programmable Controllers
Instructions Reference Manual
SYSMAC CS/CJ-series
CS1G/H-CPU@@-E, CJ1G-
CPU@@
Describes the ladder diagram programming
instructions supported by CS-series and
CJ-series PLCs.
W340-E1-@
CX-Programmer
Operation Manual
SYSMAC WS02-CXP@@-E
CX-Programmer
Provides information on how to use the CX-
Programmer, programming software which
supports CS1/CJ1-series PLCs.
W414-E1-@
CX-Server
Run Time User Manual
CX-Server Provides information on how to use the CX-
Server communication driver software
which supports CS1/CJ1-series PLCs.
W391-E2-@
CS1/CJ1W-PRM21
Operation Manual
SYSMAC CS/CJ-series
CS1/CJ1W-PRM21
PROFIBUS DP Master Units
Operation Manual
Provides information on how to install and
use the CS1/CJ1-PRM21 PROFIBUS Mas-
ter units.
W409-E2-@
C200H-series PROFIBUS DP
Master Units
Operation Manual
C200HW-PRM21 PROFI-
BUS DP Master Unit
Describes the Installation and Operation of
the C200HW-PRM21 PROFIBUS DP Mas-
ter Units.
W349-E2-@

x
!WARNING Failure to read and understand the information provided in this manual may result in per-
sonal injury or death, damage to the product, or product failure. Please read each section
in its entirety and be sure you understand the information provided in the section and
related sections before attempting any of the procedures or operations given.

xi
PRECAUTIONS
This section provides general precautions for using the PROFIBUS Master Units, Programmable Controllers and related
devices.
The information contained in this section is important for the safe and reliable operation of the PROFIBUS Master
Units. You must read this section and understand the information contained before attempting to set up or operate
a PROFIBUS Master Unit and PLC system.
1 Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
2 General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
3 Safety Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
4 Operating Environment Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
5 Application Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiv
6 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
6-1 Applicable Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
6-2 Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi
6-3 Conformance to EC Directives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvi

xii
Intended Audience 1
1 Intended Audience
This manual is intended for the following personnel, who must also have a
knowledge of electrical systems (an electrical engineer or the equivalent).
• Personnel in charge of installing FA systems.
• Personnel in charge of designing FA systems.
• Personnel in charge of managing FA systems and facilities.
2 General Precautions
The user must operate the product according to the performance specifica-
tions described in the operation manuals.
Before using the product under conditions which are not described in the
manual or applying the product to nuclear control systems, railroad systems,
aviation systems, vehicles, combustion systems, medical equipment, amuse-
ment machines, safety equipment, and other systems, machines, and equip-
ment that may have a serious influence on lives and property if used
improperly, consult your OMRON representative.
Make sure that the ratings and performance characteristics of the product are
sufficient for the systems, machines, and equipment, and be sure to provide
the systems, machines, and equipment with double safety mechanisms.
This manual provides information for programming and operating OMRON
PROFIBUS Master Units. Be sure to read this manual before attempting to
use the Unit and keep this manual close at hand for reference during opera-
tion.
!WARNING It is extremely important that all PLC Units be used for their specified pur-
poses and under the specified conditions, especially in applications that can
directly or indirectly affect human life. You must consult your OMRON repre-
sentative before using a PLC System in the above-mentioned applications.
3 Safety Precautions
!WARNING Do not attempt to take any Unit apart while the power is being supplied. Doing
so may result in electric shock.
!WARNING Never touch any of the terminals while power is being supplied. Doing so may
result in serious electrical shock or electrocution.
!WARNING Do not attempt to disassemble, repair, or modify any Units. Any attempt to do
so may result in malfunction, fire, or electric shock.
!WARNING Do not touch the Power Supply Unit while power is being supplied or immedi-
ately after power has been turned OFF. Doing so may result in electric shock.
!Caution Tighten the screws on the terminal block of the AC Power Supply Unit to the
torque specified in the operation manual. Loose screws may result in burning
or malfunction.

xiii
Operating Environment Precautions 4
!WARNING The CPU Unit refreshes I/O even when the program is stopped (i.e., even in
PROGRAM mode). Confirm safety thoroughly in advance before changing the
status of any part of memory allocated to I/O Units, Special I/O Units, or CPU
Bus Units. Any changes to the data allocated to any Unit may result in unex-
pected operation of the loads connected to the Unit. Any of the following oper-
ation may result in changes to memory status.
• Transferring I/O memory data to the CPU Unit from a Programming
Device.
• Changing present values in memory from a Programming Device.
• Force-setting/-resetting bits from a Programming Device.
• Transferring I/O memory files from a Memory Card or EM file memory to
the CPU Unit.
• Transferring I/O memory from a host computer or from another PC on a
network.
!WARNING Execute online edits only after confirming that no adverse effects will be
caused by extending the cycle time. Otherwise, the input signals may not be
readable.
4 Operating Environment Precautions
!Caution Do not operate the Unit in the following places:
• Locations subject to direct sunlight.
• Locations subject to temperatures or humidities outside the range speci-
fied in the specifications.
• Locations subject to condensation as the result of severe changes in tem-
perature.
• Locations subject to corrosive or flammable gases.
• Locations subject to dust (especially iron dust) or salt.
• Locations subject to exposure to water, oil, or chemicals.
• Locations subject to shock or vibration.
Provide proper shielding when installing in the following locations:
• Locations subject to static electricity or other sources of noise.
• Locations subject to strong electromagnetic fields.
• Locations subject to possible exposure to radiation.
• Locations near to power supply lines.
!Caution The operating environment of the PLC system can have a large effect on the
longevity and reliability of the system. Unsuitable operating environments can
lead to malfunction, failure and other unforeseeable problems with the PLC
system. Ensure that the operating environment is within the specified condi-
tions at installation time and remains that way during the life of the system.
Follow all installation instructions and precautions provided in the operation
manuals.

xiv
Application Precautions 5
5 Application Precautions
Observe the following precautions when using the PROFIBUS Master Unit.
!WARNING Failure to abide by the following precautions could lead to serious or possibly
fatal injury. Always heed these precautions.
• Always connect to a class-3 ground (100 Ωor less) when installing the
Units.
!Caution Failure to abide by the following precautions could lead to faulty operation or
the PLC or the system or could damage the PLC or PLC Units. Always heed
these precautions.
• Install double safety mechanisms to ensure safety against incorrect sig-
nals that may be produced by broken signal lines or momentary power
interruptions.
• When adding a new device to the network, make sure that the baud rate
is the same as other nodes.
• When adding a new slave device to the network, make sure that the
PROFIBUS Master Unit is in the OFFLINE state, to prevent unexpected
results when starting up the slave device.
• Use specified communications cables.
• Do not extend connection distances beyond the ranges given in the spec-
ifications.
• Always turn OFF the power supply to the personal computer, Slaves, and
Communications Units before attempting any of the following.
• Mounting or dismounting the PROFIBUS Master Unit, Power Supply
Units, I/O Units, CPU Units, or any other Units.
• Assembling a Unit.
• Setting DIP switches or rotary switches.
• Connecting or wiring the cables.
• Connecting or disconnecting connectors.
• Be sure that the terminal blocks, connectors, Memory Units, expansion
cables, and other items with locking devices are properly locked into
place. Improper locking may result in malfunction.
• Be sure that all the mounting screws, terminal screws, Unit mounting
screws, and cable connector screws are tightened to the torque specified
in the relevant manuals. Incorrect tightening torque may result in malfunc-
tion.
• Leave the label attached to the Unit when wiring. Removing the label may
result in malfunction if foreign matter enters the Unit.
• Remove the label after the completion of wiring to ensure proper heat dis-
sipation. Leaving the label attached may result in malfunction.
• Always use the power supply voltage specified in this manual.
• Double-check all the wiring and connection of terminal blocks and con-
nectors before mounting the Units.
• Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals.

xv
Application Precautions 5
• Observe the following precautions when wiring the communications
cable.
• Separate the communications cables from the power lines or high-ten-
sion lines.
• Do not bend the communications cables.
• Do not pull on the communications cables.
• Do not place heavy objects on top of the communications cables.
• Be sure to wire communications cable inside ducts.
• Use appropriate communications cables.
• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied in places where the power supply
is unstable. An incorrect power supply may result in malfunction.
• Install external breakers and take other safety measures against short-cir-
cuits in external wiring. Insufficient safety measures against short-circuits
may result in burning.
• Double-check all the wiring and switch settings before turning ON the
power supply.
• Check the user program for proper execution before actually running it on
the Unit. Not checking the program may result in an unexpected opera-
tion.
• Confirm that no adverse effect will occur in the system before attempting
any of the following. Not doing so may result in an unexpected operation.
• Changing the operating mode of the PC.
• Force-setting/force-resetting any bit in memory.
• Changing the present value of any word or any set value in memory.
• After replacing Units, resume operation only after transferring to the new
CPU Unit and/or Special I/O Units the contents of the DM Area, HR Area,
and other data required for resuming operation. Not doing so may result
in an unexpected operation.
• When transporting or storing the product, cover the PCBs with electrically
conductive materials to prevent LSIs and ICs from being damaged by
static electricity, and also keep the product within the specified storage
temperature range.
• When transporting the Unit, use special packing boxes and protect it from
being exposed to excessive vibration or impacts during transportation.
• Do not attempt to disassemble, repair, or modify any Units.
• Do not attempt to remove the cover over the non-used connector hole on
the front of the CS1W-PRM21 Unit.

xvi
Conformance to EC Directives 6
6 Conformance to EC Directives
6-1 Applicable Directives
•EMCDirectives
• Low voltage directive EN 61131-2:1994+A12:2000
6-2 Concepts
EMC Directives
OMRON Units complying with EC Directives also conform to related EMC
standards making them easier to incorporate in other Units or machines. The
actual products have been checked for conformity to EMC standards. (See
the following note.) Whether the products conform to the standards in the sys-
tem used by the customer, however, must be checked by the customer.
EMC-related performance of OMRON Units complying with EC Directives will
vary depending on the configuration, wiring, and other conditions of the equip-
ment or control panel in which OMRON devices are installed. The customer
must, therefore, perform final checks to confirm that units and the overall sys-
tem conforms to EMC standards.
Note Applicable EMS (Electromagnetic Susceptibility) and EMI (Electromagnetic
Interference standards in the EMC (Electromagnetic Compatibility) standards
are as follows:
6-3 Conformance to EC Directives
Units that meet EC directives also meet the common emission standard
(EN50081-2). The measures necessary to ensure that the standard is met will
vary with the overall configuration. You must therefore confirm that EC direc-
tives are met for the overall configuration, particularly any radiated emission
requirement (10 m).
Unit EMS EMI
CS1W-PRM21 EN 61000-6-2:2001 EN 61000-6-2:2001
CJ1W-PRM21

1
SECTION 1
Features and Specifications
This section provides an introductory overview of PROFIBUS, its functions and how to setup and configure a network. It
also addresses the PROFIBUS Master Units and the configurator, their features and specifications.
1-1 Overview of PROFIBUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1-1-1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1-1-2 PROFIBUS Communication Protocol . . . . . . . . . . . . . . . . . . . . . . . 2
1-1-3 Device Types. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1-1-4 Bus Access Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1-1-5 Diagnostic functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1-1-6 Protection Mechanisms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1-1-7 Network Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1-2 Setting up a PROFIBUS DP Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-2-1 Configuring the PROFIBUS Master . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-2-2 FDT/DTM Technology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1-2-3 GSD file Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1-3 CX-Profibus Configurator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1-3-1 CX-Profibus Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
1-3-2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

2
Overview of PROFIBUS Section 1-1
1-1 Overview of PROFIBUS
1-1-1 Introduction
Standard EN50170 PROFIBUS (PROcess FIeldBUS) is an open fieldbus standard for a wide
range of applications in manufacturing, processing and building automation.
The Standard, EN 50170 (the Euronorm for field communications), to which
PROFIBUS adheres, guarantees vendor independence and transparency of
operation. It enables devices of various manufacturers to intercommunicate
without having to make any special interface adaptations.
The PROFIBUS family comprises three mutually compatible versions:
PROFIBUS FMS, PROFIBUS DP and PROFIBUS PA.
PROFIBUS FMS FMS means Fieldbus Message Specification. This version is the general-pur-
pose solution for high-level extensive and complex communication tasks.
Powerful services open up a wide range of applications and provide great
flexibility.
PROFIBUS DP DP means Decentralized Periphery. PROFIBUS DP is optimized for high
speed and low-cost interfacing. It is specially designed for communication
between automation control systems and distributed I/O at the device level.
PROFIBUS PA PA means Process Automation. It permits sensors and actuators to be con-
nected to one common bus even in areas where intrinsically safe products are
required. It also permits data and power to be supplied over the bus using
2-wire technology according the international standard IEC 1158-2.
Uniform Bus Access
Protocol
PROFIBUS DP and PROFIBUS FMS use the same transmission technology
and uniform bus access protocol. Consequently, both versions can be oper-
ated simultaneously on the same bus. FMS field devices, however, cannot be
controlled by DP masters and vice versa.
!Caution It is not possible to exchange one of these family members by another family
member. This will cause faulty operation.
The rest of this section describes the PROFIBUS DP Protocol architecture.
1-1-2 PROFIBUS Communication Protocol
OSI reference model
ISO-7498
In general, the PROFIBUS communication protocol is based on the Open
System Interconnection (OSI) reference model in accordance with the inter-
national standard ISO-7498 (see the following illustration). The model defines
7 layers of communication functions, three of which - layers 1, 2, and 7 - are
used in PROFIBUS.
• Layer 1, the Physical Layer of this model, defines the physical transmis-
sion characteristics.
• Layer 2, the Data Link Layer of this model, defines the bus access proto-
col. This protocol also includes data security and the handling of trans-
mission protocols and telegrams.
• Layer 7, the Application Layer of this model, defines the application func-
tions. This Layer is only applicable to PROFIBUS FMS.

3
Overview of PROFIBUS Section 1-1
PROFIBUS DP In the rest of this manual, only PROFIBUS DP is considered.
OSI Layer 1, 2 and User
Interface
PROFIBUS DP uses layers 1 and 2, and the user interface. Layers 3 to 7 are
not defined for PROFIBUS DP. The user interface Layer defines the interface
functions for specific application areas, i.e. the PROFIBUS DP basic functions
and communication profiles.This streamlined architecture ensures fast and
efficient data transmission. The application functions which are available to
the user, as well as the system and device behaviour of the various PROFI-
BUS DP device types, are specified in the user interface.
OSI Layer 1: Transmission
Medium
RS-485 transmission technology or fibre optics are available for transmission.
RS-485 transmission is the most frequently used transmission technology. Its
application area includes all areas in which high transmission speed and sim-
ple inexpensive installation are required. PROFIBUS modules are intercon-
nected by single twisted-pair shielded copper wires.
RS-485 Technology The RS-485 transmission technology is very easy to handle. Installation of the
twisted pair cable does not require expert knowledge. The bus structure per-
mits addition and removal of devices or step-by-step commissioning of the
system without influencing the other devices. Later expansions have no effect
on devices which are already in operation.
RS-485 Transmission
Speed
Transmission speeds between 9.6 kbit/s and 12 Mbit/s can be selected as
shown in the table below. One unique transmission speed must selected for
all devices on the bus when the system is commissioned.
Cable length The maximum cable length values depend on the transmission speed. The
length can be increased by the use of repeaters. However, it is not recom-
mended to use more than three repeaters in series in a PROFIBUS network.
DP-Profiles
DP-Extensions
User Interface Layer DP Basic Functions
(7) Application Layer
(6) Presentation Layer
(5) Session Layer NOT DEFINED
(4) Transport Layer
(3) Network Layer
(2) Data Link Layer Fieldbus Data Link (FDL)
(1) Physical Layer RS485 / Fibre Optics
Baud rate (kbit/s) Distance / segment (m)
9.6 1200
19.2 1200
45.45 1200
93.75 1200
187.5 1000
500 400
1500 200
3000 100
6000 100
12000 100

4
Overview of PROFIBUS Section 1-1
1-1-3 Device Types
PROFIBUS distinguishes between master devices and slave devices.
Master Devices Master devices determine the data communication on the bus. A Master can
send messages without an external request, as long as it holds the bus
access right (the token). Masters are also referred to as active devices in the
PROFIBUS standard.
There are two types of master devices:
Class 1 Master (DPM1) A PROFIBUS DP Class 1 Master (DPM1) device is a central controller, which
exchanges information with the decentralized devices (i.e. DP slaves) within a
specified message cycle.
Class 2 Master (DPM2) PROFIBUS DP class 2 Master (DPM2) devices are programmers, configura-
tion devices or operator panels. They are used during commissioning, for con-
figuration of the DP system, or for operation and monitoring purposes.
The CS1W-PRM21 and the CJ1W-PRM21 are both PROFIBUS DP Class 1
Master devices.
Slave Devices Slave devices are peripheral devices. Typical slave devices include input/out-
put devices, valves, drives, and measuring transmitters. They do not have bus
access rights and they can only acknowledge received messages or send
messages to the master when requested to do so. Slave devices are also
called passive devices
Device Profile To enable the exchange of devices from different vendors, the user data has
to have the same format. The PROFIBUS DP protocol does not define the for-
mat of user data, it is only responsible for the transmission of this data. The
format of user data may be defined in so called profiles. Profiles can reduce
engineering costs since the meaning of application-related parameters is
specified precisely. Profiles have been defined for specific areas like drive
technology, encoders, and for sensors / actuators.
PROFIBUS DP-V1 PROFIBUS DP-V1 is an extension to the PROFIBUS DP protocol standard. It
defines acyclic message services between a PROFIBUS DP-V1 Master and a
PROFIBUS DP-V1 slave device. These acyclic message services allow
exchange of extended parameter settings as well as extended diagnostics
and alarm information, during regular I/O data exchange. PROFIBUS DP-V1
devices must at least support PROFIBUS DP.
PROFIBUS DP-V1 services are designated as MSACn services (Master-
Slave Acyclic, Class n), in which n designates the Master Class (i.e. 1 or 2).
The CS1W-PRM21 and the CJ1W-PRM21 both support PROFIBUS DP-V1
Class 1 Master functions as of Unit version 2.0.
1-1-4 Bus Access Protocol
OSI Layer 2: Bus Access
Protocol
The PROFIBUS bus access protocol is implemented by OSI layer 2. This pro-
tocol also includes data security and the handling of the transmission proto-
cols and messages.
Medium Access Control The Medium Access Control (MAC) specifies the procedures which determine
when a device is permitted to transmit data. A token passing procedure is
used to handle the bus access between master devices, and a polling proce-
dure is used to handle the communication between a master device and its
assigned slave device(s).

5
Overview of PROFIBUS Section 1-1
Token Passing The token passing procedure guarantees that the bus access right (the token)
is assigned to each master within a precisely defined time frame. The token
message, a special message for passing access rights from one master to the
next master, must be passed around the logical token ring - once to each
master - within a specified target rotation time. Each master executes this pro-
cedure automatically.
Polling Procedure The polling or master-slave procedure permits the master, currently in pos-
session of the token, to access its assigned slaves. The figure below shows a
possible configuration The configuration shows three active devices (masters)
and six passive devices (slaves).
The three masters form a logical token ring. When an active device receives
the token message, it can perform its master role for a certain period of time.
During this time it can communicate with all assigned slave devices in a mas-
ter-slave communication relationship, and a DPM2 master can take the initia-
tive to communicate with DPM1 master devices in a master-master
communication relationship.
Multi-peer Communication In addition to logical peer-to-peer data transmission, PROFIBUS DP provides
multi-peer communication (broadcast and multicast).
Broadcast
Communication
In the case of broadcast communication a master device sends an unac-
knowledged message to all other devices (masters and slaves).
Multicast Communication In the case of multicast communication a master device sends an un-acknowl-
edged message to a predetermined group of slave devices.
1-1-5 Diagnostic functions
Extensive Diagnostics Extensive diagnostic functions defined in PROFIBUS DP enable the fast loca-
tion of error at slave devices. Diagnostic messages are transmitted over the
bus and collected at the master. Three diagnostic message types are defined:
Device Related
Diagnostics
• Messages concerning the general operational status of the whole device,
e.g. over temperature, low voltage.
Module Related
Diagnostics
• Messages indicating that an error is present in a specific I/O range of a
device, e.g. an 8-bit output module.
Channel Related
Diagnostics
• Messages indicating an error at a given input or output, e.g. short circuit
on Output 5.
DPM1 DPM2 DPM1
Token Passing
Polling
PROFIBUS
Passive stations
Slave devices
Active stations
Master devices