Siemens SINAMICS V90 Operating Instructions Manual page 280

Diagnostics
12.1 List of faults and alarms
Fault
F7452: Following error too
high
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
F7453: Position actual value
preprocessing error
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
F7458: EPOS: Reference
cam not found
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF1 (OFF2,
OFF3)
Acknowledgement:
IMMEDIATELY
F7459: Zero mark not detect-
ed
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
280
Cause
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.
An error has occurred during the position
actual value preprocessing.
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.
After leaving the reference cam, the axis
has traversed the maximum permissible
distance (p2609) between the reference
cam and the zero mark without finding the
zero mark.
Remedy
Check the causes and resolve.
Check the encoder for the position actual
value preprocessing.
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)
Check the encoder regarding zero mark.
•
Check the maximum permissible distance
•
between the reference cam and zero mark
(p2609).
Use an external encoder zero mark
•
(equivalent zero mark).
See also: p2609 (EPOS search for reference
max distance ref cam and zero mark)
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 04/2017, A5E37208830-003