Siemens SINAMICS V90 Operating Instructions Manual page 283

Fault
F7491: STOP cam minus
reached
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF3
Acknowledgement:
IMMEDIATELY
F7492: STOP cam plus
reached
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF3
Acknowledgement:
IMMEDIATELY
F7493: LR: Overflow of the
value range for position actu-
al value
Message class: Applica-
tion/technological function
faulty (17)
Reaction: OFF1 (OFF2,
OFF3)
Acknowledgement:
IMMEDIATELY
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 04/2017, A5E37208830-003
Cause
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 "refer-
enced" or "adjustment 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.
12.1 List of faults and alarms
Remedy
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:
EPOS: p29247 * p29244
Motor encoder without position tracking:
For multiturn encoders:
•
EPOS: p29247 * p29248 * 4096 / p29249
For singleturn encoders:
•
EPOS: p29247 * p29248 / p29249
Diagnostics
283