Yaskawa Large Capacity Sigma II Series - Manual (Page 365)

8 Inspection, Maintenance, and Troubleshooting
8.2.1 Troubleshooting Problems with Alarm Displays
8-26
„ A.C1
A.C1: Servo Overrun
Display and Outputs
Note: OFF:Output transistor is OFF (alarm state). ON: Output transistor is
ON.
Status and Remedy for Alarm
Alarm Outputs
Alarm Code Outputs ALM Output
ALO1 ALO2 ALO3
ON OFF ON OFF
Cause Remedy
A Servomotor wiring incorrect or discon-
nected. Check wiring and connectors at servomotor.
B Encoder wiring incorrect or disconnected. Check wiring and connectors at encoder.
C Encoder defective. Replace the servomotor.
D Circuit board (1PWB) defective. Replace SERVOPACK.
At power ON
Parameter
Pn50A.1 = 7
D
Occurred 1 to 3 seconds
after power ON
Parameter
Pn50A.1 = Other
than "7"
A, B, C, D
On speed reference input A, B, C
When servo ON (/S-ON)
signal turned ON
A, B, C, D