10/22/2010 8:17 PM | |
Joined: 12/22/2006 Last visit: 1/25/2022 Posts: 1742 Rating:
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Hello, The communication can only be failsafe if both systems are failsafe. Failsafe S7 FH systems are described in this manual: (http://support.automation.siemens.com/WW/view/en/2201072) Chapter 1.2 lists the Hardware and software components of S7 F/FH Systems Chapter 7.2 explains the Safety-related communication between S7 F Systems and S7 Distributed Safety. I guess that it is what you look for. |
Best regards |
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10/25/2010 9:19 AM | |
Joined: 10/7/2005 Last visit: 9/5/2024 Posts: 3018 Rating:
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Hello anup20 you can still send data from the F-CPU to the H-system, but you will do so via "standard" communication (NOT via the safetyrelated communciation blocks) andprogram the communication in your "standard" program (NOT in thesafety program of your 315-F). Note that you can of course still send information from the safety program (the "standard" program has access to F-DB's and F-I/O's, see chapter 7 of the Distributed Safety manual for more)to the 400H system. This "safety" relevant data does however now "loose" any safety Catogery rating and is sent as "standard" data. I hope this helps |
Cheers |
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10/26/2010 8:48 AM | |
Joined: 10/7/2005 Last visit: 9/5/2024 Posts: 3018 Rating:
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Hello anup20 A send of a DB (be it a "standard" DB or F-DB)is a read access to the DB. Since you can read outALLdata from the safety program(e.g. F-I/O's, F-DB's, F-IDB's) in your "standard"program, you needn'tworry about any safety related passivationthat may take place (your "standard" program will simply take the F-DB valuesand send them). Having said that, I personally would probably marshall (copy) all safety relateddata that are of interest from the (various) F-DB's and F-I/O's into a "standard" DB and send that one out. This way you minimize teh amoutn fo dat to be sent, have better control over when to copy the data (e.g. ensure data consistency) and can avoiddata marshalling in the Safety program. I hope this helps |
Cheers |
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