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

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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

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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

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1.3 Operator Control and Monitoring with C7
Using the C7, you can visualize operating states and current process values.
You can also enter information at the C7 that is written to the C7 CPU. You
can also configure functions for machine diagnostics on the C7.
The C7 provides a series of standard functions. You can adapt the displays
and the operation of the C7 to the particular requirements of your process.
The C7 OP processes the operator control and monitoring functions of the
C7. It is independent of the C7 CPU and continues to operate, for example, if
the C7 CPU changes to the STOP mode. The C7 OP has its own MPI address
and is connected to the C7 CPU via the MPI interface. This MPI interface
also provides the link between the C7 OP and a configuration computer
(programming device/PC).
The basic functions of a C7 are to display process states and control the
process. The operator control and monitoring is flexible and is selected by
the user and downloaded to the C7. The following display and operator
functions can be configured for the C7:
SScreens
SEvent messages
SMulti-language operator menus
Logically related process data from the control system can be displayed
together in one screen and modified individually as required. A screen
consists of several screen entries since, for example, the description of a
machine state generally requires more related data than can be represented in
one section of the display. This allows, for example, data about the operating
temperature, tank level, rotational speed and run time to indicate the current
machine state.
The C7-621 and C7-621 AS-i systems have line-oriented displays. A screen
consists of text elements made up of static text and current (dynamic) status
values.
Event messages provide information and instructions for the operator relating
to current machine or process states during normal operation. Event messages
can contain process values. The representation of the process values can be
either numeric or symbolic.
Overview
C7 OP
Operator Control
and Monitoring
Functions
Screens
Event Messages
Introduction

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System messages display internal states of the C7. They indicate, for
example, operator errors or problems in communication. This type of
message has the highest display priority. If a problem occurs on the C7, the
currently displayed event message is cleared and a system message is
displayed.
Message texts, screens, information texts and system messages can be
displayed in several languages. A maximum of three of the languages listed
below can be loaded simultaneously and selected by the operator online:
SGerman
SEnglish
SFrench
SItalian
SSpanish
Before a C7 can be put into operation, it must be prepared so that it can
visualize data from the C7 CPU. This preparation is known as configuration.
You configure the C7 OP using a computer (programming device/PG) with
the ProTool/Lite configuration software.
Configuration can be divided into three parts:
SControl data
SAssignment of parameters for the interface
SLanguage selection
Once this configuration has been created, it is downloaded to the C7 OP. For
this step, the computer must be connected to the C7 via an MPI interface.
Once the configuration has been downloaded to the C7 OP, the process
management phase can be started after running a restart on the OP. The
C7 OP then reacts to process signals from the C7 CPU or to operator input
based on the configuration that has been loaded on it.
For information about configuring the C7 OP, refer to the user manuals for
ProTool or ProTool/Lite.
System Messages
Languages
Configuration /
Process
Management
Introduction

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1.4 C7 Overview
The SIMATIC C7-621/C7-621 AS-i units consist of several components that
interact with each other:
SA CPU of the SIMATIC S7-300 class (C7 CPU)
SA line-oriented SIMATIC OP (C7 OP)
SIntegrated digital and analog I/Os (C7-621 I/Os)
SA P bus attachment for expanding the C7-621 with S7-300 modules via
the IM 621
SAn MPI interface for communication with the programming device/PC
and other S7-CPUs, C7 control systems and OPs
SAn AS-i interface (AS-i) for connecting sensors and actuators (with the
C7-621 AS-i version, see Figure 1-2)
C7-621
C7
I/Os
P bus MPI
interface
C7 CPU C7 OP
CPU memory
C7 CPU
OP memory
C7 OP
STEP 7
ProTool Lite
or
ProTool
Figure 1-1 Components of the C7-621
The individual components integrated in the SIMATIC C7 control system
correspond to the components that can also be used in modular
configurations consisting of an S7-300 CPU, OP etc. The I/O expansion via
the P bus interface (IM 621) allows the connection of a maximum of 4
SIMATIC S7-300 modules. The AS-i interface allows the connection of
sensors and actuators to the C7-621 AS-i (Figure 1-2).
Introduction

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The general functions also correspond to a configuration with standard
modules from the PLC and OP ranges. The individual components operate
independently of each other and each processor has its own memory.
The C7 CPU is programmed with STEP 7 and the C7 OP is configured with
ProTool/Lite. The software runs under Windows 95 on a programming device
or PC.
C7-621 AS-i
C7 AS-i
MPI
interface
C7 CPU C7 OP
CPU memory
C7 CPU
OP memory
C7 OP
STEP 7
ProTool Lite
or
ProTool
P bus
Figure 1-2 Components of the C7-621 AS-i
Introduction

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Startup
This chapter explains the following:
SHow the C7 starts up
SWhat you need to do if no configuration has been downloaded and when a
configuration has been downloaded
SHow to activate the C7 CPU modes RUNP, RUN, STOP and MRES
SHow to activate the DI/DO status display
SHow to reset the memory on the C7
Section Description Page
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 Resetting the C7 Memory 2-11
In this Chapter
Chapter
Overview
2

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2.1 Starting Up
After connecting the power supply, the C7 performs a self test. During this
test, it checks the functionality of the most important device components and
indicates the test results with the status LEDs and on the display. The startup
procedure is as follows:
1. The C7 runs a self test after POWER ON.
2. The C7 runs an operating system test for both sections (C7 CPU and
C7 OP). If there is already a user program in the flash memory, the
C7 CPU loads this program into the work memory.
3. During startup (1. and 2.), the C7 CPU remains in the STOP mode.
After startup, the C7 OP is in the message mode.
The following standby message is then displayed:
= Anwahl der
DIR–Funktion
SIMATIC C7 Vx.xx
C7-621
Figure 2-1 C7-621 Standby Message
4. After starting up, the last selected C7 CPU mode is valid.
How you proceed from here depends on the situation on the C7:
SNo control program loaded. The control program must be loaded.
SAcontrol program is loaded.
SNo configuration loaded.
SA configuration is loaded.
The following sections explain what to do in each of the situations.
To be able to control and monitor the process, the C7 OP must be able to
access data on the C7 CPU. This means that you must first load a user
program if no user program is present. To load a user program, follow the
steps below:
1. Set the C7 CPU to the STOP mode (see Section 2.2).
2. Activate the transfer of the user program and data blocks on your
programming device/PC using STEP 7.
3. Start the copy function on the programming device/PC.
If no configuration has been loaded, the screens in the firmware are activated
in English. In this case you select the C7 OP mode in which you can transfer
a configuration. To do this, follow the steps outlined below:
Startup
Load Control
Program
No OP
Configuration
Loaded
Startup

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Step Activity Result
1. Select the configuration permanently
stored on the C7 by pressing ENTER
Screens System
||>>
2. Select System with
F4 OpMode Language
||>>
3. Select OpMode with F2 Operat. mode Online
4. Select the Transfer
function by pressing the two keys
simultaneously
Start the transfer with
SHIFT
ENTER
Operat. mode MPIDown
Ready for transfer
When you transfer the
configuration, it is loaded via
the MPI interface.
5. Now activate the transfer of the
configuration to the C7 on your
programming device/PC using
“ProTool/Lite”.
A soon as the configuration is
loaded, the message mode is set
and the configured standby
message is displayed.
6. You can now change to the following
modes
SC7 system function menu by
pressing the two keys
simultaneously
SScreens by pressing
0
SHIFT
ENTER
SIMATIC C7 Vx.xx
C7-621
If a configuration has already been loaded, you can start this by pressing the
ENTER key and the configured “Start Screen” is displayed.
OP Configuration
Loaded
Startup

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If a configuration is already loaded, you can download a new configuration
following the same procedure as explained in “No Configuration Loaded”.
If the standard screen or the function mentioned above is not available in the
currently loaded configuration, you must remove the existing configuration
using the memory reset function before you can load a new configuration.
For detailed information about the memory reset function, refer to Section
2.4.
To reset the memory on the OP:
1. Turn off the C7.
2. Press and hold the keys  simultaneously.
3. Turn on the power for the C7.
4. The remaining steps are analogous to “No Configuration Loaded”.
Reloading an OP
Configuration
Startup

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2.2 Selecting the C7 CPU Mode
You can select the system function menu in any mode on the C7-621 and
C7-621 AS-i. When this menu is displayed, you can select the following
menus or functions:
SC7 CPU mode selection F1
– RUN-P
– RUN
–STOP
– MRES
SDI/DO status display (C7-621) F5
SAS-i (C7-621 AS-i) F5
You select this menu by pressing the SHIFT 0keys simultaneously.
The following menu is displayed depending on the version of the unit you are
using:
C7Ć621
C7 System Functions
KEY IN/OUT
F1 F2 F3 F4 F5
Figure 2-2 System Function Menu and Function Keys on a C7-621
C7Ć621 ASĆi
C7 System Functions
KEY AS-i
F1 F2 F3 F4 F5
Figure 2-3 System Function Menu and Function Keys on a C7-621 AS-i
System Functions
Menu
Selecting the
System Function
Menu
Startup

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You select the C7 CPU modes menu in the system function menu by
pressing the  key.
The following menu is displayed (the MODE: STOP is an example):
= Anwahl der
DIR–Funktion Currently
selected
mode
Keys for
selecting
further modes
MODE:STOP
RUNP RUN STOP MRES
    
Figure 2-4 “C7 CPU Modes” Menu and Function Keys
Selecting the Mode
Menu
Startup