
11.TROUBLESHOOTING B-63945EN/02
- 604 -
11.15 ALARM SV0404 (V READY ON)
Causes and Countermeasures
This alarm is issued if the servo ready signal (VRDY) of a servo
amplifier remains on.
The servo amplifier or the axis control cards on the CNC may be
defective.
- VRDY
CNC
Servo amplifier
MCON: From the CNC to the servo amplifie
(Turn MCC on to request the activation of the
servo motor)
VRDY: From the servo amplifier to the CNC
(Notifies that the servo is ready)
The exchange of this information is performed via the FSSB (optical
cable).
This alarm is issued if VRDY remains on when the CNC turns MCON
off or if VRDY turns on before the CNC turns MCON on.
- Replacing the servo amplifier
The servo amplifier may be defective. Replace the servo amplifier.
- Replacing the axis control cards
If replacing the servo amplifier does not solve the problem, replace the
axis control cards.