2
Fault list – safety technology
Fault 14 Encoder 2
Manual – Fault Descriptions MOVISAFE
®
CS..A
22
Subfault: 14.71
Description: Response time of safety card exceeded
Response: FS – warning
Cause
Measure
The response time for calculating the speed or
acceleration cannot be adhered to. This can be
due to the following reasons:
– The safety card has received more corrupt tele-
grams from the encoder than the error tolerance
allows.
– The actual refresh time of the encoder is
greater than parameterized.
– Check the wiring.
– Check the encoder.
– Adjust the refresh time to the value in the en-
coder manual.
– If the fault occurs repeatedly, replace the safety
card and send it together with the fault number to
SEW-EURODRIVE. For further support, contact
SEW‑EURODRIVE Service.
INFORMATION
In "Emergency mode" manual mode, you can
move the drive using the motor encoder even if
the external position encoder is faulty.
Subfault: 14.72
Description: Internal fault – overflow during position calculation
Response: FS – warning
Cause
Measure
Overflow detected during internal calculation of
the position.
Adjust startup parameters, for example:
– Numerator scaling/denominator scaling of the
encoder.
– User units of the position.
Subfault: 14.73
Description: Encoder range overflow pending
Response: FS – warning
Cause
Measure
The encoder is just before overflow. The system
is too fast. The position difference is above the
1/4 encoder range. With 1/2 encoder range, an
undetected reversal of the direction of rotation oc-
curs and consequently a permanent error in posi-
tion.
– Reduce the system speed.
– Use an encoder with a larger encoder measur-
ing range (resolution/multi-turn range).
27799182/EN – 10/2022
