COMLI Protocol must it be activated?
I am trying to test a VPN to a AC800M which should be taking COMLI (Slave) on com3, the libraries are connected in the project. Within the Section (Access Variables / Address) the PLC seconds is mapped to R205, when I connect with a COMLI OPC Server, Serial Diagnostics I receive a value of 0 in this register. Is it necessary to somehow activate COMLI Communications? Should the TX/RX lights flash if communications are active(on this PLC they are not flashing
In the attacjed document you can see both cases: AC800M, COM3 is COMLI Slave or Master
LED Rx/Tx should flash when there is activity on the port. In case AC800 is Master and configured block Connect and Read to port 3, it periodically sends requests (Tx) to the port (Tx is flashing).
Check the cable connection. For COM3:
pin 3 = Td
pin 6 = Rd
pin 4,5 = 0V