Siemens SINAMICS V90 Operating Instructions Manual page 336

Diagnostics
11.2 List of faults and alarms
Fault
F7490: Enable signal with-
drawn while traversing
Reaction: OFF1
Acknowledgement:
IMMEDIATELY
F7491: STOP cam minus
reached
Reaction: OFF3
Acknowledgement:
IMMEDIATELY
F7492: STOP cam plus
reached
Reaction: OFF3
Acknowledgement:
IMMEDIATELY
F7493: LR: Overflow of the
value range for position actu-
al value
Reaction: OFF1 (OFF2,
OFF3)
Acknowledgement:
IMMEDIATELY
336
Cause
For a standard assignment, another
•
fault may have occurred as a result of
withdrawing the enable signals.
The drive is in the "switching on inhibit-
•
ed" state (for a standard assignment).
The STOP cam minus was reached.
For a positive traversing direction, the
STOP cam minus was reached, i.e. the
wiring of the STOP cam is incorrect.
The STOP cam plus was reached.
For a negative traversing direction, the
STOP cam plus was reached, i.e. the
wiring of the STOP cam is incorrect.
The value range (-2147483648 ...
2147483647) for the position actual value
representation was exceeded. When the
overflow occurs, the "referenced" or "ad-
justment absolute measuring system"
status is reset.
The position actual value (r2521) has
•
exceeded the value range.
The encoder position actual value has
•
exceeded the value range.
The maximum encoder value times the
•
factor to convert the absolute position
from increments to length units (LU)
has exceeded the value range for dis-
playing the position actual value.
Remedy
Set the enable signals or check the cause
•
of the fault that first occurred and then re-
sult (for a standard assignment).
Check the assignment to enable the basic
•
positioning function.
Leave the STOP cam minus in the posi-
•
tive traversing direction and return the ax-
is to the valid traversing range.
Check the wiring of the STOP cam.
•
Leave the STOP cam plus in the negative
•
traversing direction and return the axis to
the valid traversing range.
Check the wiring of the STOP cam.
•
If required, reduce the traversing range or
position resolution p29247.
Note for case = 3:
If the value for the maximum possible abso-
lute position (LU) is greater than 4294967296,
then it is not possible to make an adjustment
due to an overflow.
For rotary encoders, the maximum possible
absolute position (LU) is calculated as fol-
lows:
Motor encoder with position tracking:
IPos: p29247 * p29244
•
PTI: 1048576 * p29012[X] * p29244
•
/ p29013
Motor encoder without position tracking:
For multiturn encoders:
•
– IPos: p29247 * p29248 * 4096
/ p29249
– PTI: 1048576 * p29012[X] * 4096
/ p29013
For singleturn encoders:
•
– IPos: p29247 * p29248 / p29249
– PTI: 1048576 * p29012[X] / p29013
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E36037884-002