Siemens simatic c7-621 User manual

Contents
User Information
Introduction 1
Startup 2
Controlling
Controlling with the C7 CPU 3
Addessing, Parameter
Assignment, Functions of the
C7 I/Os 4
AS-i
Introduction to AS-i 5
AS-i Application and Functions 6
Operation and Monitoring
Operating the C7 7
Standard Operator Control and
Monitoring Functions 8
Extended Operator Control and
Monitoring Functions 9
Appendix
SFCs, SFBs, and IEC
Functions on the C7 CPU A
System Status List on the
C7 CPU and AS-i PICS B
C7 OP Functionality / Standard
Screens / System Messages C
References D
Siemens Worldwide E
Glossary, Index
C79000-G7076-C622-01
C7-621, C7-621 AS-i
Control Systems
Volume 2
Working with C7
Manual
SIMATIC

ii
C7-621 / C7-621 AS-i Control Systems
C79000 G7076 C622 01
This manual contains notices which you should observe to ensure your own personal safety, aswell 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
indicatesthatdeath,severepersonalinjuryorsubstantialpropertydamagewillresultifproperprecautionsare
not taken.
!Warning
indicatesthatdeath,severepersonalinjuryorsubstantialpropertydamagecanresultifproperprecautionsare
not taken.
!Caution
indicates that minor personal injury or property damage can result if proper precautions are not taken.
Note
drawsyourattentiontoparticularlyimportantinformationontheproduct,handlingtheproduct,ortoaparticular
part of the documentation.
The device/system may only be set up and operated in conjunction with this manual.
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 sys-
tems in accordance with established safety practices and standards.
Note the following:
!Warning
Thisdeviceanditscomponentsmayonlybeusedfortheapplicationsdescribedinthecatalogorthetechnical
description, and onlyinconnectionwith devicesorcomponentsfromothermanufacturerswhichhavebeen
approved or recommended by Siemens.
Thisproductcanonlyfunctioncorrectlyandsafelyifitistransported,stored,setup,andinstalledcorrectly,and
operated and maintained as recommended.
SIMATICRand SINECRare 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.
We have checked the contents of this manual for agreement with the
hardwareandsoftwaredescribed.Sincedeviationscannotbeprecluded
entirely, we cannot guarantee full agreement. However, the data in this
manualarereviewedregularlyandanynecessarycorrectionsincludedin
subsequent editions. Suggestions for improvement are welcomed.
Subject to change without prior notice.
ESiemens AG 1997
Disclaimer of LiabilityCopyright ESiemens AG 1997 All rights reserved
Thereproduction,transmissionoruseofthisdocumentoritscontentsis
notpermittedwithoutexpresswrittenauthority.Offenderswillbeliablefor
damages.Allrights,includingrightscreatedbypatentgrantorregistration
of a utility model or design, are reserved.
Siemens AG
BereichAutomatisierungssystem
IndustrialAutomationSystems
Postfach4848, D-90327Nuernberg
Siemens Aktiengesellschaft C79000-G7076-C622
Safety Guidelines
Qualified Personnel
Correct Usage
Trademarks

iii
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C622-01
Contents
1 Introduction 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Controlling with the C7 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 C7 AS-i CP in the C7-621 AS-i 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Operator Control and Monitoring with C7 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.4 C7 Overview 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Startup 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Starting Up 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Selecting the C7 CPU Mode 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 DI/DO Status Display (C7-621) 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Memory Reset on the C7 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Controlling with the C7 CPU 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 C7 CPU : Overview 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Programming the C7 CPU 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Performance of the C7 CPU 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Test and Reference Data Functions of the C7 CPU 3-7. . . . . . . . . . . . . . . . . . .
3.4.1 Clock and Run-Time Meter 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Blocks on the C7 CPU 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 C7 CPU Parameters 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.1 “Cycle/Clock Memory” Tab 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.2 “Startup” Tab 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.3 “Diagnostics/Clock” Tab 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.4 “Retentive Memory” Tab 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.5 “Interrupts” Tab Page 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.6 “Cyclic Interrupt” Tab Page 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6.7 “Nodes – MPI” Parameter Field in the “General” Tab Page 3-23. . . . . . . . . . . . .
3.7 Calculating the Cycle and Reaction Time of the C7 CPU 3-25. . . . . . . . . . . . . .
3.7.1 Reaction Time 3-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.2 Example of Calculating the Cycle and Reaction Time 3-32. . . . . . . . . . . . . . . . .
3.7.3 Interrupt Reaction Time 3-35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7.4 Example of Calculating the Interrupt Reaction Time 3-37. . . . . . . . . . . . . . . . . . .
3.7.5 Reproducibility of Time-Delay and Cyclic Interrupts 3-38. . . . . . . . . . . . . . . . . . .
3.8 Loading/Erasing the C7 CPU Flash Memory 3-39. . . . . . . . . . . . . . . . . . . . . . . . .

iv C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C622-01
4 Addressing, Parameter Assignment, and Functions of the C7 I/Os 4-1. . . . . . . . . .
4.1 Slot-Oriented Address Assignment for Signal Modules 4-2. . . . . . . . . . . . . . . .
4.2 Addressing the C7 Digital I/Os 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3 Use and Functions of the C7 Analog I/Os 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.1 Addressing Analog I/Os 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.2 Analog Value Representation 4-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.3 Analog Value Representation for the Measuring Ranges of the
Analog Inputs 4-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.3.4 Analog Value Representation for the Output Range of the
Analog Outputs 4-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4 Examples of Programming the Analog I/Os 4-11. . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.1 Block for Scaling Analog Output Values 4-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.4.2 Block for Scaling Analog Input Values 4-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Introduction to AS-i 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Introduction 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2 AS-i System Concept 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.2.1 System Characteristics and Important Data 5-7. . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 The C7-AS-i CP for C7-621 AS-i 5-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4 Further AS-i System Components 5-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.1 The AS-i Cable 5-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.2 AS-i Modules 5-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.3 AS-i Repeater / Extender 5-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.4.4 Sensors/Actuators with an Integrated AS-i Connection 5-14. . . . . . . . . . . . . . . .
5.5 The Master Mode - Commands, Sequence, Programming 5-15. . . . . . . . . . . . .
5.5.1 Operating Phases and Functions 5-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 AS-i Application and Functions 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.1 AS-i Application and Functions 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2 Standard Operation 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.2.1 Configuring the C7 AS-i CP for Standard Operation 6-3. . . . . . . . . . . . . . . . . .
6.2.2 Addressing the C7 AS-i CP with a Program 6-5. . . . . . . . . . . . . . . . . . . . . . . . . .
6.3 Control and Display Elements of the C7-621 AS-i 6-10. . . . . . . . . . . . . . . . . . . .
6.3.1 Setting the Configuration or Protected Mode 6-14. . . . . . . . . . . . . . . . . . . . . . . . .
6.3.2 Setting the Address of a Slave 6-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.3 Setting the AUTOPROG Mode 6-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.4 Replacing a Defective Slave and Automatic Address Programming
(AUTOPROG) 6-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.5 Setting the Desired Configuration from the Actual Configuration 6-22. . . . . . . .
6.3.6 Status of the Slaves 6-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.3.7 Status and Error Messages of the Master 6-26. . . . . . . . . . . . . . . . . . . . . . . . . . .
6.4 Error Indicators on the C7 AS-i CP / How to Remedy Errors 6-27. . . . . . . . . . .
6.4.1 Diagnostics and Response to Interrupts of the C7 AS-i CP 6-28. . . . . . . . . . . .
6.5 Extended Operation with FC AS-i_3422 6-36. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.5.1 Interface for C7 AS-i CP Commands 6-42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6.6 AS-i Cycle Time and Number of Connected Slaves 6-60. . . . . . . . . . . . . . . . . . .
Contents

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C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C622-01
7 Operating the C7 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.1 Keyboard 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.2 Operating Levels 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3 Working with Standard Functions 7-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.3.1 Setting C7 OP Modes 7-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.4 Modifying the Address in the MPI Network Configuration 7-13. . . . . . . . . . . . . .
7.5 Entering Values 7-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.6 Setting C7 System Parameters and Language 7-18. . . . . . . . . . . . . . . . . . . . . . .
7.6.1 Setting the Date and Time 7-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.7 Password Protection 7-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.7.1 Password Level and Access Rights 7-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.7.2 Logging In and Out on the C7 OP 7-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.7.3 Password Management 7-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.8 Hardware Test 7-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 Standard Operator Control and Monitoring Functions 8-1. . . . . . . . . . . . . . . . . . . . . .
8.1 Messages 8-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.1.1 Event Messages 8-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.1.2 System Messages 8-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.1.3 Displaying Messages 8-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.2 Screens 8-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.3 Timers and Counters 8-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.3.1 Timer 8-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.3.2 Counters 8-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.4 STATUS VAR and FORCE VAR with the C7 OP 8-15. . . . . . . . . . . . . . . . . . . . . .
9 Extended Operator Control and Monitoring Functions 9-1. . . . . . . . . . . . . . . . . . . . .
9.1 Process-Dependent Operator Control and Monitoring 9-2. . . . . . . . . . . . . . . . .
9.2 Self-Defined Screen Hierarchy 9-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.3 Evaluation of the Screen Number 9-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.4 Image of the System Keyboard 9-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.5 Communication 9-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.5.1 Connection to the S7-300 via MPI 9-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.5.2 Interface Area in SIMATIC S7 9-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.5.3 Control and Callback Bits 9-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.5.4 Connection ID 9-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.5.5 Time and Date 9-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A SFCs, SFBs, and IEC Functions on the C7 CPU A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.1 SFCs and SFBs A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.2 IEC Functions A-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents

vi C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C622-01
B System Status List on the C7 CPU and AS-i PICS B-1. . . . . . . . . . . . . . . . . . . . . . . . . .
B.1 System Status List B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B.2 AS-Interface Protocol Implementation Conformance Statement (PICS) B-8. .
C C7 OP Functionality / Standard Screens / System Messages C-1. . . . . . . . . . . . . . . .
C.1 C7 OP Functionality C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.2 Brief Description of the Standard Screens C-3. . . . . . . . . . . . . . . . . . . . . . . . . . .
C.3 System Messages C-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C.3.1 Internal Errors C-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D References D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
E Siemens Worldwide E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary Glossary-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index Index-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents

1-1
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C622-01
Introduction
This chapter explains what you require to program the C7 and how you can
use the C7 as an operator control and monitoring device.
Note
The C7 consists of two independent units.
- C7 CPU with C7 AS-i CP (in the C7-621 AS-i) and
- C7 OP
Where necessary, these components are dealt with separately.
You require the following equipment and tools:
SA programming device or PC with an MPI interface and a programming
device cable
SSTEP 7, Version 3.1 or higher and the relevant documentation
SThe ProTool or ProTool/Lite configuration tool, Version 2.51 or higher
and the relevant documentation
SC7 connector set for I/Os and power supply
Section Description Page
1.1 Controlling with the C7 1-2
1.2 C7 AS-i CP 1-3
1.3 Operator Control and Monitoring with C7 1-5
1.4 C7 Overview 1-7
In this Chapter
What You Require
to Operate the C7
Chapter
Overview
1

1-2 C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C622-01
1.1 Controlling with the C7
The user program runs on the C7 CPU. This controls the process to be
visualized by the operator control and monitoring components of the C7.
The way in which the C7 CPU operates is determined by the following
components:
Program Memory
This contains the user program
Processor
The processor executes the program cyclically:
SAt the beginning of the cycle, the processor reads the signal states of all
inputs and creates the process image input table (PII)
SThe program is executed step-by-step while referencing internal counters,
memory bits and timers.
SThe processor stores the calculated signal states in the process image
output table (PIQ). The signal states are then transferred to the outputs.
The C7 CPU is independent of the C7 OP. The C7 CPU has its own MPI
address and is connected to the C7 OP via the MPI interface.
At present, there are three standard programming languages available for
programming the C7 CPU:
SSTL: A statement list consists of a series of statements. Each statement in
your program contains instructions in the form of mnemonics which
represent a function for the C7 CPU to perform.
SLAD: A ladder diagram is a graphical program language that resembles
electrical circuit diagrams.
SFBD: A function block diagram is a graphical programming language
representing the logic in logic boxes familiar from Boolean algebra.
Other optional programming languages include SCL and HiGraph.
The tool you use to create user programs is STEP 7. The user manual /231/
contains all the instructions for programming. When programming in a
specific language, use the manual listed in the preface of /231/.
STEP 7 runs on a programming device or PC. You can operate these devices
independent of the C7. You generally only connect the programming device
or PC to the C7 via the MPI interface when you want to download your user
program to the C7 CPU.
Overview
C7 CPU
Programming
Languages
Programming
Software
Devices
Introduction

1-3
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C622-01
1.2 C7 AS-i CP in the C7-621 AS-i
The AS interface or actuator-sensor interface is a communication system for
binary sensors and actuators at the lowest field level. Process signals
generated in the field are normally transferred to the controller using a large
amount of parallel wiring and input/output modules. This means that every
sensor or actuator in the field is connected to the input/output modules with
its own separate cable.
With the AS interface, this cable harness can be replaced by a simple
common 2-wire cable for all sensors and actuators.
The technical data and ordering information for AS-i actuators and sensors is
listed in the Siemens Catalog ST PI.
The main characteristics of the AS-i system are as follows:
SMaster-slave access technique
SElectronic address setting
SOperating reliability and flexibility
S2-wire cable (unshielded) for data and power supply
STree configuration with cable lengths up to 100 m
SDirect integration
SIncreased functionality, greater use for the customer
SAdditional power supply when more power is required
SCycle time maximum 5 ms with 31 slaves
SMaximum of 31 slaves
SMaximum of 248 binary I/Os (124 inputs, 124 outputs)
The AS-i CP supports two types of operation:
Standard Operation
Standard operation allows particularly simple installation and programming
of the C7 AS-i CP.
In standard operation, the C7 AS-i CP behaves like an I/O module. It
occupies 16 input and 16 output bytes in the analog area of the controller. In
this operation, the slaves are assigned the default value for the parameters
(FH) saved on the CP. Parameters and commands cannot be transferred in
standard operation.
Overview
How the C7 AS-i
CP Functions
Numeric Data
C7 AS-i CP Modes
Introduction

1-4 C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C622-01
Extended Operation
In extended operation, you can use the complete range of functions as
described in the AS-i master specification. This type of operation is
supported by a function (FC) that is supplied on a diskette with this manual.
In extended operation using the FC, you can also implement master calls in
the user program.
Introduction