cuffers65240
Member
Can a ML 1400 be a modbus tcp slave? I have these little HMI's that support modbus tcp as both slaves and masters and would like to connect four of them as masters to control the plc from 4 operator stations. I tried them as just plain old Ethernet ip but they seem to crash their messages and only one screen ends up communicating with the plc while the others show comm errors. Anyway, I have read that multiple masters can exist on a modbus tcp network and think this may be the cure.