See what is it like to connect cables to hot standby link on a live M580 PLC.
The M580 PLC comes witha hot standby diagnostic LED (Hsby Diag) which is located on the bottom of the Hsby Link port. When you connect only one port, the Hsby Diag LED will blink green once per seconds, and if both the links are connected, on both the M580 PLC controller will the Hsby Diags is solid green.
Note that the hsby (hot standby) can be either copper or fiber. In my demo, I am using a copper (Ethernet) cable. I am using a Finisar fclf8521P2BTL-SH transceiver.