Ahmed.tn

Dear Experts,

i want to make a direct communication to Wincc V7.0.SP3 from a third part non siemens Modbus TCP/IP server.

According to the suppliar's datasheet the third party has a custom structured Modbus interface called UDI. This is User defined Index(UDI) addressing for retrieval of Transaction record and display of messages on the Display; since generally the transaction record and message displays on screen require more bytes of data send receive. The UDI method can only interface via custom programming interface of MODBUS and not direct only reading of registers.

For Example: Refer to the Communication Manual on Modbus UDI; we have Transaction data to be retrieved from the third-party; we send the type of data index we need to read to third pary, then Size of data; then command to read or write the data; the actual data read would be available in the data buffer to perform further actions.

so i don't know how to make a custom modbus TCP/IP interface using the wincc standard driver !?

did any one can help on this issue 

thanks a lot

 Hi Ahmed
Am working on Honeywell MSC-L . UDI seems to quite complex.
How did you end up creating custom modbus structure for UDI? Before implementing is that possible toread UDI data buffer from CASModbus scanner? 

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Split from third pary Modbus TCP/IP.