S7 1200 USS PROTOCOL

Hello,

then I see problem in code steps, here I recommend check what code does and if some error situations are handled correctly (output parameters, STATUS, ERROR, ...) genrally need to be checked in your code programatically to have info about correct functionality/problems.

Hello,

I think you can solve this problem, try think about blocks used. There is some PORT block which probably define (cfg) some required parameters about correct cfg of communication. If I see correctly, you have put this block to cyclic OB what i see not correct. This cfg block (generally) need to be run once in my opinion not cyclically, simply after f.ex. restart of PLC (init proc) you set with this block required parameters and thats all, you need only check output parameters if all was done correctly, without error. If you call cfg block again and again, maybe one other permission read/write can be executed but you still overwrite comm cfg again and again - wrong step. If some error occure, via that ERROR and STATUS parameters you need look what is problem. With your error code (16#9199) is clear that you set wrong length about parameter, pls refer to TIA Online help about block, especially error codes. No worry, try calm think what steps you need to do, especially with then read/write you need take to account that next request you can do only after previous task is complete, also maybe with error but complete. Your output parameters are very important to solve this problem.

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