I have five temperature control units, I have set IP addresses on them and can ping them and have also setup communications in TCU’s. TCU’s have ethernet to serial converter on them so I have selected MODBUS/96/1 for the serial settings as the Modbus map tells me to.
All my transactions are reporting exception code 11.
I have tried different UID (255 and 1), and I have tried some different starting register/address values (1, 40000, 40001). But I have not had any luck.
I attached Modbus map, transaction monitor, and CFG file. Am I doing something wrong in setup? What else can I try modifying in config to get things talking?
EN2MB-R Adv TCU.cfg (14.1 KB)