Siemens SINAMICS V90 Operating Instructions Manual page 302

Diagnostics
11.2 List of faults and alarms
Fault
F7493: LR: Overflow of the
value range for position actu-
al value
Reaction: OFF1 (OFF2,
OFF3)
Acknowledgement:
IMMEDIATELY
F7599: Encoder 1: Adjust-
ment not possible
Reaction: OFF1 (NONE,
OFF2, OFF3)
Acknowledgement:
IMMEDIATELY
F7800 Drive: No power unit
present
Reaction: NONE
Acknowledgement:
IMMEDIATELY
F7801: Motor overcurrent
Reaction: OFF2
Acknowledgement:
IMMEDIATELY
302
Cause
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.
The maximum encoder value times the
factor to convert the absolute position from
increments to length units (LU) has ex-
ceeded the value range (-2147483648 ...
2147483647) for displaying the position
actual value.
The power unit parameters cannot be read
or no parameters are stored in the power
unit.
The permissible motor limit current was
exceeded.
Effective current limit set too low.
•
Current controller not correctly set.
•
Motor was braked with an excessively
•
high stall torque correction factor.
Up ramp was set too short or the load
•
is too high.
Short-circuit in the motor cable or
•
ground fault.
Motor current does not match the cur-
•
rent of Motor Module.
Remedy
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 without position tracking:
IPos: p29247 * p29248 * 4096 / p29249
•
for multiturn encoders
PTI: 1048576 * p29012[X] * 4096
•
/ p29013 for multiturn encoders
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 without position tracking:
IPos: p29247 * p29248 * 4096 / p29249
•
for multiturn encoders
PTI: 1048576 * p29012[X] * 4096
•
/ p29013 for multiturn encoders
Carry out a POWER ON (power off/on) for
•
all components.
Change the module.
•
Reduce the stall torque correction factor.
•
Increase the up ramp or reduce the load.
•
Check the motor and motor cables for
•
short-circuit and ground fault.
Check the Motor Module and motor com-
•
bination.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 07/2015, 6SL3298-0AV60-0BP0