[Cause]
Gun connection processing at power-on failed. Possible causes are:
1. Another alarm occurred during power-on processing.
2. The servo gun is not connected correctly. (Broken pulsecoder cable, faulty additional-axis amplifier, etc.)
[Countermeasure]
First, check other alarms that occurred at the same time and take the corresponding countermeasures. The following is an example of another simultaneous alarm: Servo-058 SYSTEM FSSB i initialization error (j). If the alarm still occurs after these countermeasures, check for problems with servo gun wiring and related items.