Fauls
Q3 240-840A
32
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7.2
Error diagnosis
Error diagnosis
Malfunction
Causes
Motor does not run
-Wrong power supply and motor connections
-Activated fuses
-Missing enable or command value
-Current limit too low
-Missing BTB
Motor speeds up
-Wrong polarity of the actual value
(Tacho armature voltage)
-Values of the tacho switch S9 too low
-Command value too high
For armature voltage control
-Field current too low
-Fuses, armature voltage feedback activated
Motor runs unsteadily
-Mechanical defect of the tacho
-Tacho malfunction
-Amplification on the speed controller too low or too high
-Wrong PID parameter
-Command value errors
-Amplification of the current controller too low or too high
No motor torque
-Current limits too low
-Field current too low
-Mechanical overload of the axis
