2/11/2016 9:23 AM | |
Joined: 10/7/2005 Last visit: 2/12/2025 Posts: 3034 Rating:
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Hello nauticalnat the number of simultaneously active acyclic DPV1 related data record read/writes range between 4 and 48 in S7 CPU's as per FAQ What restrictions are there for active jobs when communicating with "WR_REC" / "RD_REC" and "RDREC"/ "WRREC" via PROFIBUS DP and PROFINET IO? Saying that, note that a Profibus DP master will only allow one acyclic DPV1 request per Profibus scan which takes place after the DP Master has finished doing its cyclic I/O data exchange with all DP Slaves. Presuming you use only one DP Master interface on your Quantum PLC to which all SIMOCODE's are connected, it won't make at lot of sense triggering more than one acyclic DPV1 related data record read/write request at the same time (in other words, you're best of to multiplex these and only read/write one SIMOCODE record from one SIMOCODE at a time, then do the next, then the next and so on...).
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Cheers |
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