Specifications

YASKAWA Inverter Drive A1000 – Crane Software Application Manual
55
Troubleshooting
Problem Cause Corrective Action
Fault OPE11 has occurred. Parameter setting error.
See section 8
Fault OPE22 or OPE23 has occurred. Parameter setting error.
See section 8
Fluctuation is occurring in Open Loop Vector Mode when
lowering the load without a counter-weight
Setting error when operating in reverse (S1-20). Set S1-20 to “1”.
Fluctuation occurs in Open Loop Vector Mode when
performing lowering operations in a traverse crane or a
hoist crane with a counter-weight.
Setting error when operating in reverse (S1-20). Set S1-20 to “1”.
Sequence Fault SE1~SE4 has occurred. External sequence or parameter setting error.
See section 7.1.6
The crane sequence and/or impact stop sequence aren’t
functioning.
Parameter b1-02 equals zero (allowing the Run Command
via the digital operator),
Change b1-02 to “1” (Control Circuit Terminal), and have the
Run Command entered via the control circuit.
The drive remains stopped although a Run Command has
been entered.
The external baseblock signal is active (by default, terminal
S8 is set to External Baseblock N.C.)
Input external baseblock signal correctly, or deactivate
external baseblock input with H1 parameters.
Deceleration Rate is not always constant
Decel time is not functioning properly due to the stall
prevention setting.
Increase the deceleration time to the point where the Stall
Prevention Function isn’t triggered.
The motor stops when running at the speed of the Brake
Release Frequency.
Excessive motor slip
Setting error in the Brake Release Frequency (S1-01, -02)
Increase the Brake Release Frequency (S1-01, -02).
Output Current is too high, and/or the crane is fluctuating (in
Open Loop Vector Control).
Brake Sequence has not been tuned
Drive parameter gain setting and motor do not match
Refer to “Appendix I: Tuning Procedures”.
Excessive current just after the crane has stopped lowering
and started to hoist the load.
Depends on the characteristics of the motor.
See section 7.1.4
The load slips down or drops suddenly.
V/f setting is to low.
When operating in Vector Control Mode:
Motor parameters have not been tuned
Torque Limit is set too low.
Increase the V/f setting.
When in Open Loop or Closed Loop Vector Control:
Perform Auto-Tuning
Increase the setting for the Torque Limit.
Excessive slipping at start.
Brake Release Current / Torque (S1-05~08) is set too low.
V/f setting is too low
When in Open Loop or
Closed Loop Vector Control:
The setting in C4-02 is too long during Torque
Compensation (Open Loop Vector)
Torque Compensation Amount / Torque Forcing Amount
(S1- 09) is too low.
Slip Prevention Time (S1-15) setting is to short (when not in
Closed Loop Vector Control
Stop Timer (b2-04) setting is too short (Closed Loop Vector
Control)
Increase the Brake Release Current / Torque (S1-05~08).
Increase the V/f setting.
When in Open Loop or Closed Loop Vector Control:
Lower the Torque Compensation Primary Delay Time
(C4-02) to as low as 20 ms.
Increase the Torque Compensation / Forcing Amount
(S1-09).
Set a longer Slip Prevention Time in S1-15 (when not in
Closed Loop Mode)
Set a longer DC Injection time at stop (in Closed Loop
Vector Control)
Refer to “Appendix I: Tuning Procedures”.
Brake slips at start.
Brake Release current, Torque (S1-05~08) setting is too
high.
V/f setting is too high.
Decrease the Brake Release Current / Torque (S1-05~08).
Lower the V/f setting.
Refer to “Appendix I: Tuning Procedures”.
Brake slips when the drive has stopped.
Slip Prevention Time (S1-15) is too long
Slip Prevention Frequency (S1-14) is set too high
Shorten the Slip Prevention Time (S1-15)
Lower the Slip Prevention Frequency (S1-14)
Refer to “Appendix I: Tuning Procedures”.