Siemens SIMOTICS S-1FL6 - Page 394

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)