YASKAWA 1000 Series Installation Manual page 30

7 Troubleshooting
Digital Operator Display
Cause
PG encoder cable noise
interference.
The PG encoder is disconnected
or is not wired properly, or the
PG option or PG encoder are
damaged.
Digital Operator Display
Cause
E5-11 is not set properly.
An external force on the load
side caused the motor to move.
Noise interference along the PG
encoder cable is affecting the A
channel or B channel.
The PG encoder is disconnected
or is not wired properly, or the
PG option or PG encoder are
damaged.
The PG encoder rotational
direction set to F1-05 is in the
opposite direction of the motor
wiring.
Digital Operator Display
Cause
E5-11 is not set properly.
30
Z Channel Pulse Noise Fault Detection
dv2
The Z channel pulse is out of phase by more than 5 degrees for the number of
times specified in parameter F1-17.
Separate the PG encoder cable wiring from the source of the noise (e.g., drive
output wiring).
• Rewire the PG encoder and make sure all wiring including shielded wiring is
properly connected.
• If the problem continues after cycling power, replace the PG option or the PG
encoder.
Inversion Detection
• Torque reference and acceleration are in opposite directions.
dv3
• The speed reference and actual motor speed differ by over 30% for the number
of pulses set to parameter F1-18.
Set the value for Δθ to E5-11 as specified on the motor nameplate.
• Make sure the motor is rotating in the proper direction.
• Investigate problems on the load side causing motor rotation in the opposite
direction.
• Check PG encoder wiring and make sure all wiring including shielded wiring is
properly connected.
• If the problem continues after cycling power, replace the PG option or the PG
encoder.
Make sure motor wiring for each phase (U, V, W) is connected properly.
Inversion Prevention Detection
Pulses indicate that the motor is rotating in the opposite direction of the speed
reference. Set the number of pulses to trigger inverse detection to F1-19.
dv4
Note: To avoid nuisance faults, be sure to disable inverse detection in applications
where the motor may rotate in the opposite direction of the speed reference. Set
F1-19 to 0 to disable this feature.
• Set the value for Δθ to E5-11 as specified on the motor nameplate.
• If the problem continues after cycling power, replace the PG option or the PG
encoder.
YASKAWA ELECTRIC TOBP C730600 52D 1000-Series Option PG-E3 Installation Manual
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution