SEND/RCV-ALL Conflict?

T

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Tom Idstein

We have implemented communication via industrial ethernet via Siemens OPC server. We are running an S5-135U with a 928CPU, CP143, CP1613, and using LabVIEW as our HMI. There are SEND/RCV-ALL blocks written in the STEP5 main program for our existing CP527. There is a main program conflict when an additional call to SEND/RCV-ALL for the CP143 is inserted. We can monitor all flags, inputs, outputs, etc. but the main STEP5 program does not run correctly. The main program runs correctly when the added calls are not present. Is it possible to have multiple SEND/RCV-ALL calls in the same main program, OB1? If so, should they happen one after another, or should there be some time delay between the two? Any help is greatly appreciated.
 
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