My Task: To control write to registers to my MSI430 safety PLC from Leuze Electronic using a HMI as a master.
Protocol: Modbus TCP
MSI430 (Modbus TCP - server/slave)
Generic HMI (Modbus TCP - client/master)
I'm reading Okay from the Register address 401101-40110
But I'm not able to write to the MSI PLC to address 402101-402109
Please see the attached images for gateway description for the device.
Please advice/guide on how this could be done.
I have tried using MBPoll and it says Illegal Data Address.
Please find the below link for the manual