Yaskawa PG-E3 Motor Encoder Feedback - Manual (Page 27)

7 Troubleshooting
26 YASKAWA ELECTRIC TOBP C730600 52C 1000-Series Option PG-E3 Installation Manual
Digital Operator Display Fault Name
dv2
Z Channel Pulse Noise Fault Detection
The Z channel pulse is out of phase by more than 5 degrees for the number of
times specified in parameter F1-17.
Cause Possible Solution
PG encoder cable noise
interference. Separate the PG encoder cable wiring from the source of the noise (e.g., drive
output wiring).
The PG encoder is disconnected
or is not wired properly, or the
PG option or PG encoder are
damaged. • 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.
Digital Operator Display Fault Name
dv3
Inversion Detection
• Torque reference and acceleration are in opposite directions.
• The speed reference and actual motor speed differ by over 30% for the number
of pulses set to parameter F1-18.
Cause Possible Solution
E5-11 is not set properly. Set the value for Δθ to E5-11 as specified on the motor nameplate.
An external force on the load
side caused the motor to move.
• Make sure the motor is rotating in the proper direction.
• Investigate problems on the load side causing motor rotation in the opposite
direction.
Noise interference along the PG
encoder cable is affecting the A
channel or B channel.
• 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.
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.
Make sure motor wiring for each phase (U, V, W) is connected properly.
Digital Operator Display Fault Name
dv4
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.
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.
Cause Possible Solution
E5-11 is not set properly.
• 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.