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Appendix-2:
Check List and Trouble Shooting
If any error or faults occur during a test run, consult the table below.
Problem
Cause
Counter-Measure(s)
Fault OPE11 has occurred.
Parameter setting error.
See section “7. Faults and Counter-Measures”
Fault OPE22 or OPE23 has occurred.
Parameter setting error.
See section “7. Faults and Counter-Measures”
Fluctuation is occurring in Open Loop Vector
Mode when lowering the load without a
counter-weight (using a hoisting crane).
Setting error when operating in reverse (S1 -20). Change the parameter access level (A1-01) to “2”,
and then 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). Change the parameter access level (A1-01) to “2”,
and then set S1 -20 to “ 1”.
Sequence Fault SE1~SE4 has occurred.
External sequence or parameter setting error.
See section 6.1.5, “Sequence Errors”.
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 continues to be
given (using an N.C. relay).
Have the External Baseblock signal input to the
terminal selected for External Baseblock, or simply
don’t use the External Baseblock signal.
Poles are scrambled due to the stop position and
the load rate.
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-3: Tuning Procedures”.
Excessive current just after the crane has
stopped lowering and started to hoist the load.
Depends on the characteristics of the motor.
・
Set parameter S2 -03 based on the formulas in,
“Appendix-1: Parameter Calculations
”.
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 Flux Vector Control Mode:
・
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 Flux Vector Control
Mode:
・
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.
・
Increase the Brake Release Current / Torque
(S1 -05~08).
・
Increase the V/f setting.
When in Open Loop or Flux Vector Control
Mode:
・
Lower the Torque Compensation Primary
Delay Time (C4-02) to as low as 20ms.
・
Increase the Torque Compensation / Forcing
Amount (S1-09).
Refer to, “Appendix-3: Tuning Procedures”.
Excessive slipping when the drive is stopping.
・
Slip Prevention Time (S1 -15) setting is to short
(when not in Flux Vector Co ntrol
・
Stop Timer (b2-04) setting is too short (Flux
Vector Control)
・
Set a longer Slip Prevention Time (when not in
Flux Vector Mode
・
Set a longer Stop Timer (in Flux Vector Control)
Refer to, “Appendix-3: Tuning Procedures”.
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