Hi All,

I am facing issue with CM PtP (6ES7 137-6AA00-0BA0) module as modbus master with S7-300 CPU. I  am using FB640, FB641 for modbus master communication downloaded from the attached link.

https://support.industry.siemens.com/cs/ww/en/view/75226762 

when i initialize FB640 it get intialize without any error. but i am getting error W#16#8280 in the modbus master block, also when i raise request in the modbus master block i don't see and TX/RX Led blink. On doing further diagnosis with modbus master instance DB i have found the RD_REC is giving an error DW#16#C0809000.

I am not able to find a solution to my issue, Can anyone please help on the following issue.

I have attached my project code and screen shot of modbus master instance DB

Thanks

Regards

Irfan

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Split from s7-300 with cm ptp (137-6aa00-0ba0) act as a modbus master.

Hi irfan.thakur,

have you found the solution for tis problem?