Siemens Sinamics V90 Operating Instructions Manual page 393

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
F7447: Load gear: Position
tracking, maximum actual
value exceeded
Message class: Applica-
tion/technological function
faulted (17)
Reaction: NONE
Acknowledgement:
IMMEDIATELY
F7449: Load gear: Position
tracking actual position out-
side tolerance window
Message class: Applica-
tion/technological function
faulted (17)
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 04/2019, A5E36037884-007
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.
When the position tracking of the load gear
is configured, the drive/encoder (motor
encoder) indentifies a maximum possible
absolute position actual that can no longer
be represented within 32 bits.
Maximum value: encoder resolution (2
2 ) × p29244
21
When switched off, the currently effective
motor encoder was moved through a dis-
tance greater than was parameterized in
the tolerance window. It is possible that
there is no longer any reference between
the mechanical system and encoder.
Fault value (r0949, interpre decimal):
Deviation (difference) to the last encoder
position in increments of the absolute
value after the measuring gear - if one is
being used. The sign designates the trav-
ersing direction.
Note: The deviation (difference) window is
pre-assigned quarter of the encoder range.
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
Reduce the muti-turn resolution (p29244).
or
20
Reactivete the position tracking function (set
p29243 = 1 → 0 → 1). Then the fault is
acknowledged and, if necessary, adjust the
encoder encoder (ABS).
Diagnostics
391