GE DS200FCSAG1A Industrial electronic module

D903 Inertia Detection Failed Description: At the start of the automatic control loop setting, the load moment of inertia is determined with an "oscillation attempt". This means that the speed change and the motor current must exceed a minimum value during acceleration or deceleration to guarantee a sensible and sufficiently precise calculation of the moment of inertia. Cause: • drive acceleration too low • number of measured value too small for automatic control loop setting • motor speed too low • load moment of inertia too big• increase bipolar torque/force value S-0-0092 • increase pos. accel S-0-0260 • increase pos. speed S-0-0259 • increase feedrate override S-0-0108

D904 Gain Adjustment Failed 

 In exceptional cases, difficulties in the automatic control loop setting may arise. This means that an automatic setting is not possible. Standard or default values must therefore be loaded into the drive. Cause: • oscillating mechanical systems (resonance) • high level of interference in the encoder signal Remedy: Satisfactory results can sometimes be achieved by starting the command P-0-0162, D9 automatic control loop setting with a large P-0-0163, damping factor for automatic control loop setting, i.e., low dynamics. This value can be reduced until the control loop behaves as needed. If even then control loop settings remain unsuccessful, then the setting must be manual.

D905 Wrong Position Range 

Before starting an automatic control loop setting, both travel range limits, i.e., upper and lower, must be defined. When starting command P-0-0162, D9 automatic control loop setting the number values are automatically checked for validity. It is checked if the traversing path is large enough and if sensible values have been entered. Possible fault causes: • P-0-0167, upper traversing range smaller than P-0-0166, lower traversing range • Maximum traversing path (= upper - lower limits) is less than 6 motor rotations and thus too small to start the automatic control loop setting

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