I'm looking for documentation for the functions PDAT_CY, PCD_SEND and PCD_RECV that are part of an existing Step-7 program. The best I can find so far is just a brief mention of them in the Siemens Drive ES Manual but no details on their function, parameters, etc. They are being used to communicate with a Servo Drive over profibus.
Need Documentation for Step-7 PDAT_CY, PCD_SEND and PCD_RECV functions
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