Fault
Cause
Remedy
F31117: Inversion error sig‐
nals A/B/R
Reaction: ENCODER
Acknowledgement: PULSE
INHIBIT
For a square-wave encoder (bipolar, dou‐
ble ended) signals A*, B* and R* are not
inverted with respect to signals A, B and R.
● Check the encoder/cable.
● Does the encoder supply signals and the
associated inverted signals?
F31130: Zero mark and posi‐
tion error from the coarse
synchronization
Reaction: ENCODER
Acknowledgement: PULSE
INHIBIT
After initializing the pole position using
track C/D, Hall signals or pole position iden‐
tification routine, the zero mark was detec‐
ted outside the permissible range. For dis‐
tance-coded encoders, the test is carried
out after passing 2 zero marks. Fine syn‐
chronization was not carried out.
● Check that the encoder cables are routed in
compliance with EMC.
● Check the plug connections.
● If the Hall sensor is used as an equivalent
for track C/D, check the connection.
● Check the connection of track C or D.
● Replace the encoder or encoder cable.
F31150: Initialization error
Reaction: ENCODER
Acknowledgement: PULSE
INHIBIT
Encoder functionality is not operating cor‐
rectly.
● Check the encoder type used (incremental/
absolute) and the encoder cable.
● If relevant, note additional fault messages
that describe the fault in detail.
F52980: Absolute encoder
motor changed
Reaction: OFF1
Acknowledgement: IMMEDI‐
ATELY
The servo motor with absolute encoder is
changed. Actual motor ID is different from
commissioned motor ID.
The servo motor will be automatically config‐
ured after the acknowledgement of this fault.
F52981: Absolute encoder
motor mismatched
Reaction: OFF1
Acknowledgement: IMMEDI‐
ATELY
Connected absolute encoder motor cannot
be operated. The servo drive in use does
not support the Motor ID.
Use a suitable absolute encoder motor.
F52983: No encoder detec‐
ted
Reaction: OFF1
Acknowledgement: IMMEDI‐
ATELY
The servo drive in use does not support en‐
coderless operation.
● Check the encoder cable connection
between the servo drive and the servo
motor.
● Use a servo motor with encoder.
F52984: Incremental encod‐
er motor not configured
Reaction: OFF1
Acknowledgement: IMMEDI‐
ATELY
● Commissioning of the servo motor has
failed.
● The incremental encoder motor is
connected but fails to commission.
Configure the motor ID by setting the parameter
p29000.
F52985: Absolute encoder
motor wrong
Reaction: OFF1
Acknowledgement: IMMEDI‐
ATELY
● Motor ID is downloaded wrong during
manufacture.
● The software of the servo drive does not
support the Motor ID.
● Update the software.
● Use a correct absolute encoder motor.
F52987: Absolute encoder
replaced
Reaction: OFF1
Acknowledgement: IMMEDI‐
ATELY
Incorrect absolute encoder data.
Contact the Hotline.
SINAMICS V70 faults and alarms
7.2 Common faults and alarms
Diagnostics Manual
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Diagnostics Manual, 06/2015, 6FC5398-6DP10-0BA2
