Siemens TIWAY I TI505 User manual

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SIMA TIC TIW A Y 1
TI505 Network Interface Module
User Manual
Order Number: PPX:TIWAY–8124–2
Manual Assembly Number: 2587871–0053
Second Edition
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Copyright 1994 by Siemens Industrial Automation, Inc.
All Rights Reserved — Printed in USA
Reproduction, transmission or use of this document or
contents is not permitted without express consent of
Siemens Industrial Automation, Inc. All rights, including rights
created by patent grant or registration of a utility model or
design, are reserved.
Since Siemens Industrial Automation, Inc. does not possess
full access to data concerning all of the uses and applications
of customer ’ s products, we do not assume responsibility either
for customer product design or for any infringements of patents
or rights of others which may result from our assistance.
T echnical data is subject to change.
W e check the contents of every manual for accuracy at the
time it is approved for printing; however , there may be
undetected errors. Any errors found will be corrected in
subsequent editions. Any suggestions for improvement are
welcomed.
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
MANUAL PUBLICA TION HISTORY
TIWAY I TI505 Network Interface Module User Manual
Order Manual Number: TIW AY–8124–2
Refer to this history in all correspondence and/or discussion about this manual.
Event Date Description
Original Issue 8/88 Original Issue (2601210–0001)
Second Edition 3/94 Second Edition (2601210–0002)
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
LIST OF EFFECTIVE PAGES
Pages Description Pages Description
Cover/Copyright Second
History/Effective Pages Second
iii — vii Second
viii — ix Second
1-1 — 1-6 Second
2-1 — 2-20 Second
3-1 — 3-21 Second
4-1 — 4-44 Second
A-1 — A-3 Second
B-1 — B-2 Second
C-1 — C-2 Second
D-1 — D-2 Second
E-1 — E-2 Second
Registration Second
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Contents iiiTIWAY 1 TI505 NIM User Manual
Contents
PREFACE
CHAPTER 1 TIWA
Y I OVER VIEW
1.1 TIWAY I FEA TURES 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 TIWAY I OPTIONS 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 SYSTEM BLOCK DIAGRAM 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 TIWAY I UNIVERSAL COMMAND LANGUAGE, UCL 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5 THE TI505 NIM 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHAPTER 2 NETWORK DESIGN CONSIDERATIONS
2.1 TIWAY I NETWORK CONFIGURA TION 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 Communication Media 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.2 Media Redundancy 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 RS-232-C CABLE INST ALLATION 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.1 RS-232-C Connections 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2.2 RS-232-C T iming Considerations 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 LOCAL LINE CABLE INST ALLATION 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1 Local Line Characteristics 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2 Local Line Cable 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.3 Local Line T ap Housings 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.4 Planning Considerations 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.5 Local Line T ap Spacing 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.6 Cable Routing 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.7 Obstructions 2-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 LOCAL LINE BIASING 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.1 Biasing Configurations 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.2 Networks with only Self-biased Devices 2-17. . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.3 Networks with a Single Switch-biased Device 2-17. . . . . . . . . . . . . . . . . . . . . . .
2.4.4 Networks with T wo or Mor e Switch-biased Devices 2-18. . . . . . . . . . . . . . . . . .
2.4.5 Terminating the Local Line 2-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHAPTER 3 INSTALLATION
3.1 GENERAL REQUIREMENTS 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 INSTALLING THE NIM 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 SETTING THE DIPSWITCHES 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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iv Contents SIMATIC PCS 7 OSx Library Manual
3.4 INSERTING THE MODULE INTO THE BASE 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 NIM SWITCHES 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 TI505 NIM DIAGNOSTICS 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7 MODULE LOGIN VERIFICA TION 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8 CONNECTING THE NETWORK CABLES 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHAPTER 4 NIM PRIMITIVES
4.1 OVERVIEW 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.2 PURPOSE 4-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 STRUCTURE AND OPERA TION 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 Normal Operation and Exceptions 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Exception When Reading 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3 Exception When W riting 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 LOGICAL GROUPS 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5 FIELD DEFINITIONS 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.1 Field Symbols 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.2 Length Field – LLLL 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.3 Primitive Code Field – PP 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.4 Descriptor Field 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.5.5 Basic Data Unit – DDDD 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6 DATA ELEMENT TYPES AND FORMA TS 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.7 DATA ELEMENT LOCA TION RANGES 4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.8 DATA FIELD LENGTH RESTRICTIONS 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9 TI505 NIM PRIMITIVE DESCRIPTIONS 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.1 Exception Primitive – Code 00 4-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.2 Native Primitive – Code 01 4-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.3 Status Primitive – Code 02 4-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.4 Configuration Primitive – Code 03 4-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.5 Primitive For mat Configuration – Code 04 4-25. . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.6 Packed Native Primitive – Code 05 4-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.7 Change State Primitive – Code 10 4-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.8 Read Block Primitive – Code 20 4-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.9 Read Random Block Primitive – Code 21 4-29. . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.10 Write Block Primitive – Code 30 4-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.11 Write Random Block Primitive – Code 31 4-31. . . . . . . . . . . . . . . . . . . . . . . . . . .
4.9.12 Block Data Acquisition Primitive Codes 50 51 52 4-32. . . . . . . . . . . . . . . . . . . .
4.9.13 Record Data Acquisition Primitive Codes 55 56 57 4-36. . . . . . . . . . . . . . . . . .
4.9.14 Summary of Primitives 4-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents vTIWAY 1 TI505 NIM User Manual
APPENDIX A PM550 CIM REQUIREMENTS A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1 INTRODUCTION A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.2 LOCAL LINE LENGTH A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.3 LOCAL LINE BIAS AND TERMINA TION A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.3.1 Networks with Switch-biased Devices and CIMs A-2. . . . . . . . . . . . . . . . . . . .
A.3.2 Networks with Only Self-biasing Devices and CIMs A-2. . . . . . . . . . . . . . . . . .
APPENDIX B NETWORK CONFIGURATION DATA SHEET B-1. . . . . . . . . . . . . . . . . . . . . . .
APPENDIX C NETWORK EVALUATION FORM C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX D SPECIFICA TIONS D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
APPENDIX E PRIMITIVE EXAMPLES E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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vi Contents SIMATIC PCS 7 OSx Library Manual
List of Figures
1-1 TIWAY I System Block Diagram 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 NIM Simplified Block Diagram 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Number of Local Line Secondaries versus Cable Length 2-9. . . . . . . . . . . . . . . . . . . . . . . .
2-2 TIWAY I T ap Housing 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 Tap Spacing Examples 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-4 Local Line with T wo or Mor e Switch-biased NIMs 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-5 Terminating the Local Line 2-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 NIM Dipswitches 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Dipswitch Summary 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Installing the NIM in the I/O Base 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4 NIM Switches 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5 NIM Status Indicators 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1 Basic Primitive Structur e 4-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 Binary W eight of the Fields 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3 Primitive Request and Response Field For mat 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-4 Discrete Data Element For mat 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-5 Packed Discr ete Data Element For mat 4-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-6 Forced W or d Data Element For mat 4-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-7 Forced Discr ete and CR Data Element For mat 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-8 Secondary System Status Data Element For mat 4-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A-1 Local Line Bias and T ermination A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Contents viiTIWAY 1 TI505 NIM User Manual
List of T ables
2-1 RS-232-C Connections 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Pin Assignments for Local Line Connectors 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 TI505 Component Power Requir ements 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Network Addr ess Selection 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Network Data Rate Switch Settings 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1 Logical Primitive Assignment 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 TI505 NIM Primitive Subset 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-3 Summary of Primitive Field Symbols 4-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-4 Data Element T ypes and Lengths 4-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-5 Data Element Location Ranges 4-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-6 Maximum Read Primitive Data Byte Length 4-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-7 Maximum W rite Primitive Data Byte Length 4-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-8 Summary of Primitives 4-41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-9 Summary of Primitives(extended addr essing) 4-43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Preface ix TIWAY 1 TI505 NIM User Manual
Preface
MANUAL OVER VIEW
This manual contains the information necessary to install and operate the SIMA TIC
TI505 Network Interface Module (NIM). The following information is provided.
 NIM specifications
 Installation and testing procedures
 Operating instructions and descriptions
SIMATIC TIW AYI primitive descriptions and examples
MANUAL ORGANIZATION
This manual is organized as follows:
CHAPTER 1 — TIWAY I OVERVIEW contains an overview of the TIWAY I
network and an explanation of how the TI505 NIM operates within this network.
CHAPTER 2 — NETWORK DESIGN CONSIDERATIONS describes possible
network design configurations, and the use of modems with TIW A Y I. Local Line
cabling, biasing, and termination are also discussed.
CHAPTER 3 — INSTALLATION describes NIM installation and diagnostic
procedures.
CHAPTER 4 — NIM PRIMITIVES describes NIM operation and the primitive
subset supported by the NIM.
APPENDIX A — SIMATICPM550CIM REQUIREMENTS contains
procedures for Local Line biasing and termination for networks that contain a
mixture of TI505 NIMs and PM550 Computer Interface Modules (CIM).
APPENDIX B — NETWORK CONFIGURA TION DA T A SHEET contains a form
that will help you plan your network.
APPENDIX C — NETWORK EV ALUA TION FORM contains a TIW A Y network
evaluation form. You can submit the completed form to Siemens for a network
evaluation.
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Preface
xTIWAY 1 TI505 NIM User Manual
APPENDIX D — SPECIFICATIONS provides general specifications for the
TI505 NIM
APPENDIX E — PRIMITIVE EXAMPLES provides a simple primitive example
in normal and extended addressing modes.
RELATED PUBLICATIONS
The following publications contain additional information on TIWAY I and TIWAY I
compatible products. To order these publications, contact your Siemens Industrial
Automation, Inc. distributor or sales office. If you need assistance in contacting your
distributor
or sales office in the United States, call 1–800–964–41 14.
Siemens
Manual Number
SIMATIC TIWA Y I Host Adapter User Manual PPX:TIWAY–8102
SIMATIC TIWA Y I Host Software
Programming Manual
for DEC  PDP –11 PPX:TIWAY–8107
for TI  and IBM  Personal Computers PPX:TIWAY–8108
for DEC  V AX UNILINK PPX:TIWAY–8123
PM550 Network Interface Module User Manual PPX:550–8110
SIMATIC5TI
Network Interface
Module User Manual PPX:5TI–8105
SIMATIC UNILINK Host Adapter
User Manual PPX:TIWAY–8121
SIMATICTIWAY I TI500 NIM User Manual PPX:TIWAY–8110
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TIWAY 1 Overview 1-1 TIWAY 1 TI505 NIM User Manual
Chapter 1
TIWAY 1 Overview
1.1 TIWAY I FEA TURES
TIWAY I is an industrial Local Area Network (LAN) designed to satisfy today’ s factory
and plant requirements for data acquisition and control of manufacturing processes. It is
a significant enhancement of the Siemens “Local Line,” which supports the PM550
Programmable Controllers (P/Cs) and DS 990 computer products.
The TIW A Y I network provides a reliable and flexible communication architecture. T wo
communication media options are available:
 RS-232-C/423 — provides modem interface for large geographic coverage.
Local Line — provides high noise immunity for networks up to 25,000
feet (7620 meters).
Throughout this manual, the following networking terms are used.
HDLC — TIWAY I High-level Data Link Control data communications
procedures with CRC–16 error -checking and message-length error -checking
Primary
— HDLC network manager (TIW A Y I Host Adapter , TIW A Y I Gateway ,
or UNILINK Host Adapter with the Network Manager function)
Secondary — device operating as an HDLC secondary slave (NIMs, UNILINK
Secondary Adapters, UNILINK Host Adapter acting as a Secondary)
Attached device — P/C, robot, etc. (a P/C connected to the NIM, robot connected
to a UNILINK Secondary Adapter)
 Host — computer or intelligent device establishing network communications.
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TIWAY 1 Overview
1-2 TIWAY 1 TI505 NIM User Manual
1.1 TIWAY I OPTIONS
TIWAY I network products provide a number of options.
TIWA Y I networks can be configured for short distances or a long distances.
 Redundant or single media transmission is available.
 Baud rates from 1 10 baud to 1 15.2K baud are available.
TIWAY I devices can operate with modems in either full or half duplex mode,
synchronously or asynchronously .
 Both NRZ and NRZI data encoding are available.
1.2 SYSTEM BLOCK DIAGRAM
Figure 1Figure 1 illustrates the basic system block diagram of a TIWAY I Network.
System components include:
Host System Interfaces (including Host Adapters, Gateways, and Network
Control Modules)
 Siemens Programmable Controller Network Interface Modules (NIMs)
UNILINK Secondary Adapters for interfacing non-Siemens products to
the TIW A Y I Network
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TIWAY 1 Overview 1-3 TIWAY 1 TI505 NIM User Manual
1.3 TIWAY I UNIVERSAL COMMAND LANGUAGE, UCL
TIWAY I provides a Universal Command Language for all communication on the
network. The UCL consists of a set of high-level request/response transactions known as
Primitives. Primitives are used for:
 Reading and writing data
 Acquiring status of devices attached to the network
 Performing control operations on attached devices
The Host issues requests (Primitives) to the NIMs and Secondary Adapters. The
secondaries then perform the requested operations on the attached devices and return
the appropriate response to the Host to complete the transaction. See Figure 1.
Host Systems
Host System
Interfaces Command Initiators


Siemens
Programmable
Controllers
Secondary Adapters
Non–Siemens
Network Media
Responders
devices
Figure 1 TIW A Y I System Block Diagram
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TIWAY 1 Overview
1-4 TIWAY 1 TI505 NIM User Manual
1.4 THE TI505 NIM
The TI505 NIM is the TIWAY I Network Interface Module for the SIMATIC TI505
Programmable Controllers. See Chapter 3 for a specific listing of controllers supported
by the TI505 NIM.
The TI505 NIM provides several features which ensure maximum network signal
integrity.
Each communication port is provided with a “Jabberstop” circuit to disable the
port’s transmitter in the event of a communication port failure. This helps
minimize failures resulting in continuous network transmission which would
dominate
the communication channel.
 The NIM provides data integrity checking of network communications.
 The NIM meets several stringent noise and environmental specifications.
Built-in diagnostics aid in troubleshooting NIM failures and problems.
Chapter 3 provides a description of the diagnostics.
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TIWAY 1 Overview 1-5 TIWAY 1 TI505 NIM User Manual
The TI505 NIM provides redundant TIW A Y I communication ports. Each of the following
models supports a specific type of network communication media.
PPX: N mber Port A Port B
PPX:505-7339 Local Line Local Line
PPX:505-7340 RSĆ232ĆC/423 RSĆ232ĆC/423
The RS-232-C/423 media interface is configured as Data T erminal Equipment (DTE) and
is used to connect the NIM to Data Communication Equipment (DCE) for operation with
modems. This interface uses RS-423 drivers and receivers and operates at RS-423-A
signal levels (+5 or –5 volts). These levels are also RS-232-C compatible. The pin
assignments for the RS-232-C port are given in Chapter 2.
The Local Line interface is a differential line port for use with shielded twisted pair cable.
The Local Line interface provides line isolation and high noise immunity for
installations
up to 10,000 feet (25,000 feet depending on system loading and baud rate
selection). The Local Line interface is recommended for applications where electrical
noise may be a problem.
Redundancy is supported for either choice of media.
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TIWAY 1 Overview
1-6 TIWAY 1 TI505 NIM User Manual
Figure 2 is a simplified block diagram of the TI505 NIM. The media interface blocks are
intentionally left unlabeled because the type of media interface depends on which NIM
model you are using. The blocks are described as follows.
Special Function Interface Controller (SFIC) — delivers and receives P/C com -
munications.
NIM controller — translates the communication (between Primitives and the
P/C
communication language).
Communications controller — supervises data transactions between the
NIM and the network host.
NETWORK INTERF ACE MODULE
SPECIAL
FUNCTION
INTERFACE
CONTROLLER NIM
CONTROLLER COMM. CONTROLLER
POWER




MEDIA
CIRCUITRY
TO
NETWORK
COMM.
MEDIA
Figure 2 NIM Simplified Block Diagram
The basic difference in the NIM models is the configuration of the media circuitry .
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Network Design Considerations 2-1 TIWAY 1 Ti505 NIM User Manual
Chapter 2
Network Design Considerations
2.1 TIWAY I NETWORK CONFIGURATION
TIWAY I is a multi-drop communication network which consists of a main trunk cable
(the “spine”) and dropline cables. The network can connect up to 254 secondaries (e.g.,
TI505 P/Cs) to a host computer. The TI505 NIM provides the interface to the network
host, enabling the host and the P/C to communicate with each other .
Also included with this manual is a “TIW A Y I Network Configuration Data Sheet” (Ap -
pendix B). This will assist you in maintaining a complete, up-to-date record of the config -
uration
of your network, which is especially important if you are using several different
types of secondaries.
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Network Design Considerations
2-2 TIWAY 1 TI505 NIM User Manual
2.1.1 Communication Media
The following signal-transmission media are supported by TIW A Y I:
RS-232-C/423 dedicated lease-line modem interface in which no dial-up is
necessary, providing extended (cross-continental) geographic coverage.
 RF or short-haul modem link-ups (cross-plant or cross-town coverage).
 Siemens Local Line (up to 25,000 feet).
NOTE
TIWAY I does not directly support dial-up modems which
require Modem Control Commands for communication
switchover. This can be done, but specific equipment is required
to dial the remote number from the host device.
You can select from either type of media for the network, but you cannot mix the types of
media.
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