sancruz

Hi,

check the MB_Master_DB configured on the comm_load instruction and the instance db of your MB_Master instance. They are different. The the MB_Master instruction does not get the correct settings.

regards

sancruz

 You are a life savior, thank you so much. Error is gone, and ive met a new issue which im guessing a master like you can figure out.

I have a motor where i want to read the holding hex address 5013, ive done so with CAS modbus scanner at 20499 or in modbus special utility with 5013 (lenght is 1).
This is ofc over pc. When i go into TIA ive tried about 500 different configurations but i cant get any data out. to my understanding i have to convert it so it becomes 420499 or 420500, i also tried to just add the 4 so it became 60499 but that ofc gives wrong address error. Below you can see my attempt to just pull both 420499 and 420500, with no errors.

Ive attempted a few ways to store the incomming data in the hopes that was the issue but it dosnt seem so, currently i have an array of 0...3USint

But no matter what i do i get no data out, where am i going wrong?


EDIT:
here is some more info, an example from the doc im following:
https://prnt.sc/gJNxKyN3t0Hf

https://prnt.sc/swIeGWf51BMT

Hardware setup:
we have the PLC connected to 2 modbus slaves. Slaveid 1 and Slaveid 2 the RS485 blinks at the TxD at every poll

The physical setup
https://prnt.sc/_mlbQ2vq3C8I

Hope this helps someone make sense of the situation

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Split from Siemens S7-1200 (1212C modbus error 8180).