Chapter 5
5-5
Troubleshooting
5-2 Alarms
If the Servo Driver detects an error, ALM (alarm output) will be output, the power drive
circuit in the Servo Driver will turn OFF, and the alarm will be displayed. If the Servo
Driver detects a warning (e.g., overload warning or regenerative overload warning), a
warning code will be displayed, but operation will continue.)
Note 1. Refer to 5-3-1 Error Diagnosis Using Alarm Display for appropriate alarm countermeasures.
Note 2. Cancel the alarm using one of the following methods.
• Input a RESET (alarm reset) signal.
• Turn OFF the power supply, then turn it ON again.
• Reset the alarm using the Parameter Unit keys.
The following alarms can only be cancelled by turning OFF and ON the power supply: A.04,
A.10, A.bF, A.C2, and A.C3.
Note 3. If an alarm is canceled while RUN is turned ON, the Servo Driver will start as soon as the
alarm is cleared, which is dangerous. Be sure to turn OFF the RUN command before can-
celing the alarm.
■ Servo Driver Alarm Display
If an error is detected, an alarm code will be displayed one segment at a time on the Servo Driver’s
front-panel alarm display, as shown in the following example.
Example: Alarm Code A.C2
...
After
approx. 1 s
After
approx. 1 s
After
approx. 1 s
After
approx. 1 s
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