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| 7/31/2010 2:46 PM | |
Joined: 10/7/2005 Last visit: 3/15/2025 Posts: 3042 Rating:
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Hello minhajie here are few selected links to some good reference documents to begin with: PROFINET Technology and Application - System Description PROFIsafe Technology and Application - System Description SIMATIC PROFINET System Description
There is no limit concerning themaximum distance as far as I'm aware. Profisafe happens via the so called "Black channel" (a fancy way to say that the additional Profisafe protocol features are embedded inside a "normal" message frame). While some minorconstraints do apply (see above ref doc's)you can in general use any "normal" gear for your network infrastructure.
As for having all the safety logic in one PLC my take is that it is entirely up to the designer to decide if he wants to do soor if he wants to have it across a number of PLC''s (its "horses for courses" as they say). You definetly can have the overall system related safety logic split across multiple F PLC's (but do usually create more work for yourself as you now need to program the saftey comms and take their response times into account too). Here are a few more hopefully helpful links concerning this: Safety: Calculation of the monitoring and response times by using the Excel table s7fcotib S7 Distributed Safety - configuring and programming SIMATIC Industrial Software Safety Engineering in SIMATIC S7 P.S: I presume you S7 PLC's are all the "F" type (otherwise it doesn't make sense to use Profisafe comms between them) I hope this helps |
Last edited by: fritz at: 7/31/2010 2:59 PMGot stung by the close quote bug again and reformatted it all as well as resorting to the good old double close quote trick (perhaps one day this issue will be fixed ...) Cheers |
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| 9/20/2010 6:03 PM | |
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Posts: 96 Rating:
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Hi Fritz, Thank you for detailed reply. Regards.
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