Siemens SINAMICS V90 Operating Instructions Manual page 333

Fault
F7442: LR: Multiturn does not
match the modulo range
Reaction: OFF1 (OFF2,
OFF3)
Acknowledgement:
IMMEDIATELY
F7443: Reference point coor-
dinate not in the permissible
range
Reaction: OFF1 (OFF2,
OFF3)
Acknowledgement:
IMMEDIATELY
F7450: Standstill monitoring
has responded
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
F7451: Position monitoring
has responded
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E36037884-002
Cause
The ratio between the multiturn resolution
and the modulo range (p29246) is not an
integer number. This results in the adjust-
ment being set back, as the position actual
value cannot be reproduced after power-
off/power-on.
The reference point coordinate received
when adjusting the encoder via connector
input p2599 lies outside the half of the
encoder range and cannot be set as actual
axis position.
Fault value (r0949, interpret decimal):
Maximum permissible value for the refer-
ence point coordinate.
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).
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.
•
11.2 List of faults and alarms
Remedy
Make the ration between the multiturn resolu-
tion and the modulo range an integer number.
The ratio v is calculated as follows:
Motor encoder without position tracking
•
(p29243 = 0):
– For multiturn encoders:
v = (4096 * p29247 * p29248)/(p29249 *
p29246)
– For singleturn encoders:
v = (p29247 * p29248)/(p29249 * p29246)
Motor encoder with position trakcing
•
(p29243 = 1):
v = (p29244 * 29247)/p29246
Set the reference point coordinate to a lower
value than specified in the fault value.
See also: p2599 (EPOS reference point coor-
dinate value.
For a motor with an absolute encoder, the
maximum permissible encoder range is calcu-
lated by the following formula:
For multiturn encoders:
•
(4096 * p29247) / 2
For singleturn encoders:
•
p29247 / 2
Check the causes and resolve.
Check the causes and resolve.
Diagnostics
333