Siemens Simatic Manual page 6

Table of contents
3.9.1.1 Inputs ..................................................................................................................... 3-55
3.9.1.2 Outputs .................................................................................................................. 3-56
3.9.1.3 Structure of DIAG .................................................................................................. 3-57
3.9.2 Scaling the input variables ............................................................................................ 3-58
3.9.3 Principle of operation .................................................................................................... 3-58
3.9.3.1 Parameterization ................................................................................................... 3-58
3.9.3.2 Load monitoring ..................................................................................................... 3-58
3.9.3.3 Retracting .............................................................................................................. 3-59
3.9.3.4 Testing the measuring equipment ......................................................................... 3-59
3.9.3.4.1 Case a): Test with constant load ....................................................................... 3-60
3.9.3.4.2 Case b): Test with a defined load step .............................................................. 3-60
3.9.3.5 Acknowledging faults: ............................................................................................ 3-60
3.10 Fail-safe function F_MIN_MAX ........................................................................................ 3-61
3.10.1 Introduction ................................................................................................................... 3-61
3.10.2 Connections .................................................................................................................. 3-61
3.10.2.1 Inputs ..................................................................................................................... 3-61
3.10.2.2 Outputs .................................................................................................................. 3-61
3.10.3 Principle of operation .................................................................................................... 3-61
3.10.3.1 Parameterization ................................................................................................... 3-61
3.10.3.2 Determining the minimum/maximum value ........................................................... 3-62
4 Block interaction ........................................................................................................ 4-1
4.1 Overview ................................................................................................................................ 4-1
4.2 Signal flow between the components .................................................................................... 4-1
4.2.1 Automation task .............................................................................................................. 4-1
4.3 Response in the case of an error ........................................................................................... 4-2
4.4 Block interconnection ............................................................................................................. 4-3
4.4.4 Additionally required blocks ............................................................................................ 4-0
4.4.5 Further information ......................................................................................................... 4-1
5 Abbreviations ............................................................................................................. 5-0
6 Support ....................................................................................................................... 6-1
7 Appendix .................................................................................................................... 7-1
7.1 Table with the ASRS block runtimes...................................................................................... 7-1
8 Notes ........................................................................................................................... 8-1
S7-Distributed Safety/SIMATIC Safety - fail-safe function blocks for storage and retrieval machines
- iv -