Yaskawa Σ-V Series AC Servo Drives Rotational Motor Analog Voltage Reference - Manual (Page 278)

9.3 Troubleshooting Malfunction Based on Operation and Conditions of the Servomotor
9-19
9
Trou
blesh
ooting
The SERVOPACK
suddenly entered
baseblock status
during servomotor
operation.
The main circuit power supply volt-
age is 13 V or lower.
Check voltage between main circuit
power input terminals during opera-
tion.
Set the power supply voltage to
within the specified range.
Increase the capacity of the main
circuit AC/DC power supply.
The fuse in the SERVOPACK is
blown.
− Replace the SERVOPACK.
A SERVOPACK fault occurred. −
A fault occurred in the SERVO-
PACK.
Replace the SERVOPACK.
Servomotor
Speed Unstable
Wiring connection to servomotor is
defective.
Check connections of power line
(phases U, V, and W) and encoder
connectors.
Tighten any loose terminals or con-
nectors and correct the wiring.
Servomotor
Rotates Without
Reference Input
Speed control: Speed reference
input is incorrect.
Check V-REF and SG to confirm if
the control method and the input are
agreed.
Correct the control method selec-
tion parameter, and the input signal.
Torque control: Torque reference
input is incorrect.
Check V-REF and SG to confirm if
the control method and the input are
agreed.
Correct the control method selec-
tion parameter, and the input signal.
Speed reference offset is incorrect.
The SERVOPACK offset is
adjusted incorrectly.
Adjust the SERVOPACK offset.
Position control: Reference pulse
input is incorrect. Check the reference pulse form
(Pn200.0) and sign + pulse signal. Correct the control method selec-
tion parameter, and the input signal.
A SERVOPACK fault occurred. − Replace the SERVOPACK.
(cont’d)
Problem Probable Cause Investigative Actions Corrective Actions