Slave device not responding, modbus RTU
I am having a problem with communication to my slave device, I am using the PM860 PLC and my slave device is a ABB circuit breaker equiped with the pr 120/D-M module.
My program should work just fine, im having no errors there, but on the MBread/write block i get error code 30 or 4929 (4929 is timeout, no answer from slave).
At the moment im just trying to read some input registers (function code 04) and my starting adress is 'IW04#30xxx'. But i am having no success, i get the same error codes when i try to write registers 'QX06#40xxx'.
I have checked the settings, and they are the same on both master and slave, poll time is set to zero.
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