Siemens 6RA7086-6KS22 Operating Instructions Manual page 452

Faults / Alarms
Fault
No.
Cause as a function of fault value
(r047.001, r949.001 or r949.009 with acknowledged error)
22 With speed controller optimization run:
With an acceleration current equaling 20% or 30% of P100 (I A, motor ) + armature current required for zero speed or
With optimization run for friction moment and moment of inertia compensation:
With an acceleration current equaling the current required to achieve a steady-state speed of 10% of maximum speed +
20% of P100 (I A, motor ), the maximum speed cannot be reached within 45s +7%
Possible cause:
•
Centrifugal mass is too large
•
Drive is blocked, heavily speed-dependent or excessively high load torque
•
"Active" load is attempting to maintain a certain speed
Possible remedy:
•
Increase P100 while the optimization run is in progress in order to raise the applied acceleration current during
optimization (during the speed controller optimization run, a maximum of 45% of I A, motor (+ armature current for zero
speed) is applied as the armature current setpoint, I A,motor (P100) can thus be increased to 2.2 times the value at
maximum without exceeding 100% I A, motor during optimization)
23 With speed controller optimization run:
With an acceleration current equaling 20% or 30% of P100 (I A, motor ) + armature current required for zero speed or
With optimization run for friction moment and moment of inertia compensation:
With an acceleration current equalling the current required to achieve a steady-state speed of 10% of maximum speed +
20% of P100 (I A, motor ), the maximum speed or 100% of setpoint EMF cannot be reached within 90s +13%
Possible cause:
•
Flywheel mass is too large
•
Drive is blocked, heavily speed-dependent or excessively high load torque
•
"Active" load is attempting to maintain a certain speed
Possible remedy:
•
Increase P100 while the optimization run is in progress in order to raise the applied acceleration current during
optimization (during the speed controller optimization run, a maximum of 45% of I A, motor (+ armature current for zero
speed) is applied as the armature current setpoint, I A,motor (P100) can thus be increased to 2.2 times the value at
maximum without exceeding 100% I A, motor during optimization)
24 With speed controller optimization run:
The actual speed does not drop to below +2% of maximum speed or to below the speed threshold n min set in P370 within 2
minutes
With optimization run for field weakening:
The actual speed does not drop to below +2% of maximum speed or to below the speed threshold n min set in P370 within
10 minutes
With optimization run for friction moment and moment of inertia compensation:
The actual speed does not drop to below +2% of maximum speed or to below the speed threshold n min set in P370 within
11 or 2 minutes
Possible cause:
•
Single-quadrant drive coasts to a standstill too slowly
25 The average armature current required for the speed range from +7% to approximately +13% of maximum speed to cover
the friction and/or steady-state load torque cannot be calculated
Possible cause:
•
Drive with very little friction or very small integral-action time and, as a result of the very short measuring time,
computational inaccuracies during evaluation
•
Distorted or disturbed actual speed value
•
Large flywheel mass that is coupled to the drive via long shaft with high torsion, possibly via a
coupling with large amount of play
Possible remedy:
•
Reduce P100 for duration of the optimization run to decrease the acceleration current applied during optimization and
thus to lengthen the measuring time
Load torque too high (n set =0% n max results in n ict ≥ 40% n max ) (actual speed value is averaged over 90 firing cycles,
26
speed monitoring at ≥ 40% n max does not start for 1s after application of speed setpoint of n set =0)
Possible cause:
•
An excessively high load torque (in a positive or negative direction, e.g. suspended load) causes the drive to rotate (the
speed controller parameters are parameterized according to the factory setting during this run)
•
One of the armature current or torque limits is parameterized too low (the motor field may not be reaching full field
strength fast enough with the result that the initial motor torque is too low)
•
Maximum speed setting is incorrect
•
Pulse encoder parameters are incorrect (P140 to P143)
•
Parameters for tachometer adjustment are not correct (P741)
10-16
Description
Further information (r047.002 to r047.016)
SIMOREG DC Master
05.05
SIEMENS AG 6RX1700-0AD76
Operating Instructions