Siemens SINAMICS V90 Operating Instructions Manual page 332

Diagnostics
11.2 List of faults and alarms
Alarm
A7469: EPOS: Traversing
block < target position < soft-
ware limit switch minus
A7470: EPOS: Traversing
block > target position > soft-
ware limit switch plus
A7471: EPOS: Traversing
block target position outside
the modulo range
A7472: EPOS: Traversing
block ABS_POS/ABS_NEG
not possible
A7473: EPOS: Beginning of
traversing range reached
A7474: EPOS: End of trav-
ersing range reached
A7477: EPOS: Target posi-
tion < software limit switch
minus
A7478: EPOS: Target posi-
tion > software limit switch
plus
A7479: EPOS: Software limit
switch minus reached
A7480: EPOS: Software limit
switch plus reached
A7496: SON enable missing
A7576: Encoderless opera-
tion due to a fault active
332
Cause
In the traversing block the specified abso-
lute target position lies outside the range
limited by the software limit switch minus.
In the traversing block the specified abso-
lute target position lies outside the range
limited by the software limit switch plus.
In the traversing block the target position
lies outside the modulo range.
In the traversing block the positioning
mode ABS_POS or ABS_NEG were pa-
rameterized with the modulo correction not
activated.
When traversing, the axis has moved to
the traversing range limit.
When traversing, the axis has moved to
the traversing range limit.
In the actual traversing operation, the
target position is less than the software
limit switch minus.
In the actual traversing operation, the
target position is greater than the software
limit switch plus.
The axis is at the position of the software
limit switch minus. An active traversing
block was interrupted.
The axis is at the position of the software
limit switch plus. An active traversing block
was interrupted.
In the IPos control mode or a com-
•
pound control mode with IPos, no ser-
vo on command is sent to the drive via
Modbus when p29008 = 1.
In the IPos control mode, rising edge is
•
triggered for the P-TRG signal when
the drive is in servo off status.
In the PTI control mode, any faults
•
which is caused by implementing the
"Enable trial run" operation with the V-
ASSISTANT lead to A7496.
Encoderless operation is active due to a
fault.
Remedy
Correct the traversing block.
•
Change software limit switch minus
•
(p2580).
Correct the traversing block.
•
Change software limit switch plus (p2581).
•
In the traversing block, correct the target
•
position.
Change the modulo range (p29246).
•
Correct the traversing block.
Move away in the positive direction.
Move away in the negative direction.
Correct the target position.
•
Change software limit switch minus (CI:
•
p2580).
Correct the target position.
•
Change software limit switch plus (CI:
•
p2581).
Correct the target position.
•
Change software limit switch minus (CI:
•
p2580).
Correct the target position.
•
Change software limit switch plus (CI:
•
p2581).
Send servo on command to the drive via
•
Modbus
Set the drive to servo on status firstly and
•
trigger a rising edge for the P-TRG signal.
Acknowledge the faults firstly and imple-
•
ment "Enable trial run" again.
Remove the cause of a possible encoder
•
fault.
Carry out a POWER ON (power off/on) for
•
all components.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2015, A5E36037884