Siemens SIMATIC S7 System Manual page 10

Table of contents
3.6 Safety-Related CPU-CPU Communication.............................................................................. 3-13
3.6.1 S7 Distributed Safety: Safety-related Master-Master Communication .................................... 3-13
3.6.2 S7 Distributed Safety: Safety-related Master-I-Slave Communication .................................... 3-15
3.6.3 S7 Distributed Safety: Safety-Related I-Slave-I-Slave Communication .................................. 3-16
3.6.4 S7 Distributed Safety: Safety-Related Communication via S7 Connections ........................... 3-18
3.6.5 S7 F/FH Systems: Safety-Related Communication via S7 Connections................................. 3-20
4 Safety in F-Systems................................................................................................................................ 4-1
4.1 Introduction ................................................................................................................................ 4-1
4.2 Safety Mode ............................................................................................................................... 4-3
4.3 Fault Reactions .......................................................................................................................... 4-5
4.4 Restart of F-System ................................................................................................................... 4-6
4.5 Password Protection for F-Systems........................................................................................... 4-7
4.6 Acceptance Test of System ....................................................................................................... 4-7
4.7 Standards and Approvals........................................................................................................... 4-8
4.8 Safety Requirements................................................................................................................ 4-12
5 Achievable Safety Classes with F-I/O ..................................................................................................... 5-1
5.1 Introduction ................................................................................................................................ 5-1
5.2 Safety Functions for Achieving Safety Classes for F-I/O with Inputs ........................................ 5-2
5.2.1 1oo1 Evaluation for F-I/O with Digital Inputs.............................................................................. 5-3
5.2.2 1oo2 Evaluation for F-I/O with Inputs......................................................................................... 5-5
5.3 Safety Functions for Achieving Safety Classes for F-I/O with Outputs.................................... 5-12
6 Configuring F-Systems ........................................................................................................................... 6-1
6.1 Introduction ................................................................................................................................ 6-1
6.2 Configuring the F-CPU............................................................................................................... 6-2
6.3 Configuring the F-I/O.................................................................................................................. 6-4
6.4 Configuring Fail-safe DP Standard Slaves and Fail-safe I/O Standard Devices ....................... 6-5
7 Programming F-Systems ........................................................................................................................ 7-1
7.1 Introduction ................................................................................................................................ 7-1
7.2 Programming Languages for F-Systems ................................................................................... 7-3
7.3 Structure of the Safety Program in S7 Distributed Safety.......................................................... 7-4
7.4 Structure of Safety Program in S7 F/FH Systems ..................................................................... 7-9
A Monitoring and Response Times of F-Systems ......................................................................................A-1
A.1 Introduction ................................................................................................................................A-1
A.2 Configuring the Monitoring Times ..............................................................................................A-2
A.3 F-Related Monitoring Times for S7 Distributed Safety ..............................................................A-3
A.3.1 Minimum Monitoring Time for F-Cycle Time ..............................................................................A-4
A.3.2 Minimum Monitoring Time for Safety-related Communication between the F-CPU and
F-I/O or between I-Slave and Slave via PROFIBUS DP............................................................A-5
A.3.3 Minimum Monitoring Time for Safety-Related Master-Master Communication .........................A-6
A.3.4 Minimum Monitoring Time for Safety-Related Master-I-Slave Communication.........................A-7
A.3.5 Minimum Monitoring Time for Safety-Related I-Slave-I-Slave Communication.........................A-7
A.3.6 Minimum Monitoring Time for Safety-Related Communication via S7 Connections .................A-7
A.3.7 Monitoring Time for Safety-Related Communication between F-Runtime Groups....................A-8
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Safety Engineering in SIMATIC S7
System Manual, 04/2006, A5E00109529-05