S2N1992 posted a topic in OmronHi, I'm trying to communicate Omron CP1E unit with PC via serial port using hostlink protocol. I need to read the Timer/Counter SV value and write the timer/counter SV values to the PLC. I'm able to use other C mode commands (like RC (timer/counter PV read), WC (timer/counter PV write) etc.) but when I give the command for Timer/Counter SV Read 1 which is R#, I get the response as IC (Undefined Command). How do I write or read the timer SV Values? Example command and response : @00R#TIMH001028* (TIMH is the high speed timer, 0010 is the timer number and 28 is the FCS) Response: @00IC4A* Is is that CP1E doesn't support these commands? If so what is the equivalent command that I should send inorder to perform this? Please help.