Modbus AC800 (PLC-> HMI )
I'm trying to communicate an ac800M model pm856 with a 'parts parts' panel, via modbus 232 (serial connected to port 3). The panel must read the values from the PLC. I programmed the blocks to send data to the controller and we checked the communication port settings that coincide between master and slave. The communication does not go because it has always been recorded '4904', as a slave's mistaken answer. Putting a modbus packet mapper, I see that what is written by the PLC to the other part is done by foreign symbols (I would expect instead a 0/1, since I should send all booleans). Trying to change the starting addresses of PLC writing, something changes but not much ...
Does anyone have an idea of the problem?
Thank you in advance