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10/15/2014 8:10 AM | |
Joined: 11/21/2007 Last visit: 8/12/2024 Posts: 2325 Rating:
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Hello Gdelawin This seems to be a native limitation of S5. Even STEP5 Force VAR Function ( Used from changing values of PLC Variabled from PG ) dows not allow you to modify DB bits. Only Word / Double Word values van be modified from "Force VAR" I think ( Though, I have not seen any documentation confirming this ) that Siemens HMI softwares like PROTOOL , WinCC and WinCC Flexible use a workaround this. All data Bit Tags have to be specified as DW / DD Bits. The Runtime softwares reads the complete DW / DD , updates the indivual bits specified in the tag and writes the whole DW / DD to the PLC. Hope this helps Cheers Navnag |
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