Fanuc Alarm 5311 FSSB:ILLEGAL CONNECTION
Fanuc Alarm Description
A connection related to FSSB is illegal. This alarm is issued when either of the following is found:
1. Two axes having adjacent servo axis numbers (parameter No. 1023), odd number and even number, are assigned to amplifiers to which different FSSB systems are connected.
2. The system does not satisfy the requirements for performing HRV control, and use of two pulse modules connected to different FSSB systems having different FSSB current control cycles is specified.