Yaskawa SGDB - Manual (Page 519)

INSPECTION, MAINTENANCE, AND TROUBLESHOOTING
6.2.1 Troubleshooting Problems with Alarm Display cont.
510
J A.51
Display and Outputs
Digital Operator
Di l d
Alarm Output g p
Display and
Alarm Name
Alarm Code Output Alarm Output
Alarm Name
ALO1 ALO2 ALO3
p
A.51
Overspeed
ON OFF ON OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
Status When Alarm Occurred
A
, B, C, D, E
When servo ON (/S-ON)
signal turned ON
During high-speed
servomotor rotation
after reference in-
put
At power ON
E
A
, B, C, D, E
Cause Remedy
A • Servomotor wiring incorrect.
• Encoder wiring incorrect (disconnection,
shortcircuit, power supply, etc.)
Check and correct wiring. (Check A-, B-,
C-phase pulses correct at 2CN.)
B Incremental encoder power not supplied
from SERVOPACK.
Use the SERVOPACK power supply for
the encoder.
C Noise in encoder wiring. Separate encoder wiring from main wiring
circuits.
D Incorrect parameter (number of encoder
pulses) setting.
Set parameter Cn-11 to the correct number
of pulses.
E Circuit board (1PWB) defective Replace SERVOPACK.
6