Cause : PG Disconnect (for any control modes using a PG option card) comes when no PG pulses are received for longer than the time set to F1-14.

1. PG cable is disconnected- reconnect the cable.
2. PG cable wiring is wrong- correct the wiring.
3. PG has no power- check the power line to the PG encoder.
4. PG encoder brake is clamped shut- ensure the motor brake releases properly.