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I have Moved both posts from this topic As you're hijacking someone else's topic & you're using Atmega and not PIC. Martin I am sorry my intention is not to pertub your post I just want to solve the problem with component modbus slave and the problem is common with tow family PIC and ATMEL Best reg...

I have allready tested in my first program and the probem is present with checkforincomming macro, i think the problem is at the adress number check.
My program is very simple for my test i want just read a holding at 40001 on my cpu.
Thank your for your help.
C.LARGY

Dear sir i post the simple program that no reponse of the slave MODBUS component.

with modbus poll (i testing and validate the serial with the master modbus component its working correctly and µc it s ok )

Thank you for your colaboration to resolve this problem.
Best regards
C.Largy

Hello i want to buy a new flowcode V7 but the MODBUS slave not working (i test before buy) with MODBUS POLL or another master plc i have no reponse for exemple from ATMEGA 328 P TQFP at 16MHz at the command read single holding register 40001 i download the lastest vs of component. I want read and wr...