Which products are affected?
9300EP position controllers as of V8.0
What happens?
The position limit monitoring responds and triggers the FAIL QSP (P04, P05) fault response.
When does the problem occur?
If no homing has been performed (REF-OK = 0), if the actual position value has exceeded the position limits in terms of figures, and if the controller has been inhibited and the drive is moving (at a speed of > 3 % nmax).
Possible diagnostics?
The P04 or P05 fault response is triggered under the specified conditions.
Short-term measures/recommendations?
Ensure that the drive does not move if it has been inhibited, e. g. by means of a holding brake. In hoists, ensure the correct setting of the brake logic to accept the load without the sagging of the drive.
Evaluation:
Virtually, the problems only occur during the commissioning when it might become necessary to traverse manually. In the absolute positioning mode (C1310 = 0), it is always necessary to perform a homing of the drive (REF-OK = 1) to be able to perform positioning.
