Danfoss MCO 305 Operating Instructions Manual page 26

MCO 305 Operating Instructions
What to do, if ... ?
What to do, if the motor sets off uncontrolled or vibrates heavily?
NB!:
Turn off the motor immediately with the EMERGENCY STOP button if it vibrates heavily or sets off
uncontrolled.
If the motor sets off uncontrolled, but the encoder test previously was successful, then decrease the par.
32-60 Proportional Factor. (See Optimizing the PID controller.)
What to do, if the motor doesn't move?
If the motor doesn't move at all, then the Proportional Factor of the PID filter is probably too low or the
FC 300 has not been enabled.
Check the FC 300 enable (terminal 37 = 24 V) and check that the FC 300 wasn't stopped via the LCP. Then
increase the par. 32-60 Proportional Factor. (See Optimizing the PID controller.)
What to do, if the motor vibrates heavily?
If the motor vibrates then you have to optimize the PID controller and to adjust the other parameters of the
controller: reduce either the par. 32-60 Proportional Factor or increase the par. 32-61 Derivative Value for
PID Control.
What to do, if a "Tolerated Position Error is exceeded" is reported?
If the drive stops due to a "Tolerated Position Error is exceeded" message it is possible to determine
whether the drive was rotating in the wrong direction by comparing the curves of the set and actual values.
Check the connections of the motor or encoder. If the connections are correct, then it is necessary to
increase the par. 32-67 Maximum Tolerated Position Error. (See Optimizing the PID controller.)
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