Diagnostics
11.2 List of faults and alarms
SINAMICS V90, SIMOTICS S-1FL6
392
Operating Instructions, 04/2019, A5E36037884-007
Fault
Cause
Remedy
F7450: Standstill monitoring
has responded
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
After the standstill monitoring time expired,
the drive left the standstill window.
•
Position loop gain too low.
•
Position loop gain too high (instabil-
ity/oscillation).
•
Mechanical overload.
•
Connecting cable, motor/drive convert-
er incorrect (phase missing, inter-
change).
Check the causes and resolve.
F7451: Position monitoring
has responded
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
When the position monitoring time (p2545)
expired, the drive had still not reached the
positioning window (p2544).
•
Positioning window parameterized too
small (p2544).
•
Position monitoring time parameterized
too short (p2545).
•
Position loop gain is too low.
•
Position loop gain is too high (instabil-
ity/oscillation).
•
Drive mechanically locked.
Check the causes and resolve.
F7452: Following error too
high
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
The difference between the position set-
point and position actual value (following
error dynamic model) is greater than the
tolerance (p2546).
•
The value of p2546 is too small.
•
The gain of position loop is too small.
•
The drive torque or accelerating capac-
ity exceeded.
•
Position measuring system fault.
•
Position control sense incorrect.
•
Mechanical system locked.
•
Excessively high traversing velocity or
excessively high position reference
value (setpoint) differences.
Check the causes and resolve.
F7453: Position actual value
preprocessing error
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
An error has occurred during the position
actual value preprocessing.
Check the encoder for the position actual
value preprocessing.
F7458: EPOS: Reference
cam not found
Reaction: OFF1 (OFF2,
OFF3)
Acknowledgement:
IMMEDIATELY
After starting the search for reference, the
axis moved through the maximum permis-
sible distance to seach for the reference
cam without actually finding the reference
cam.
•
Check the "reference cam" input.
•
Check the maximum permissible distance
to the reference cam (p2606).
See also: p2606 (EPOS search for reference
reference cam maximum distance)
