Siemens SINAMICS G120D Original Instructions Manual page 315

Number Cause
F07450 Standstill monitoring has
responded
F07451 Position monitoring has responded
F07452 Following error too high
F07453 Position actual value processing
error
A07454 Position actual value processing
does not have a valid encoder
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
Remedy
After the standstill monitoring time (p2543) has expired, the drive has left
the standstill window (p2542). Check whether the following is set
correctly:
Position actual value inversion (p0410)
•
Standstill window too small (p2542)?
•
Standstill monitoring time too short (p2543)?
•
Position loop gain too low (p2538)?
•
Position loop gain too high (instability/oscillatory behavior, p2538)?
•
Mechanical overload?
•
Other possible causes:
Connecting cable, motor/drive converter incorrect (phase missing,
•
interchanged).
When selecting motor identification, select tracking mode (BI:
•
p2655[0] = 1 signal).
When the positioning monitoring time expired (p2545), the drive had still
not reached the positioning window (p2544). Check whether the following
is set correctly:
Positioning window too small (p2544)?
•
Positioning monitoring time too short (p2545)?
•
Position loop gain too low (p2538)?
•
Position loop gain too high (instability/oscillatory behavior, p2538)?
•
Another possible cause: Mechanical clamping.
The difference between the position setpoint and the actual position value
(following error dynamic model, r2563) is higher than the tolerance
(p2546). Possible causes:
The drive torque or accelerating capacity has been exceeded.
•
Position measuring system fault.
•
Position control sense is not correct.
•
Mechanical system locked.
•
Excessively high traversing velocity or excessively high position
•
setpoint differences.
Check the encoder for the actual position value processing.
Check whether one of the following causes exists:
An encoder is not assigned for the position actual value processing
•
(p2502 = 0).
An encoder is assigned, but no encoder data set has been assigned
•
(p0187 = 99 or p0188 = 99 or p0189 = 99).
An encoder and an encoder data set have been assigned, however,
•
the encoder data set does not contain any encoder data (p0400 = 0)
or invalid data (e.g. p0408 = 0).
Alarms, faults and system messages
11.6 List of alarms and faults
315