Danfoss Vacon OPTEA Operating Manual page 207

Time mode:
The SOS function is activated after a delay. Make sure that
the delay is correct for the process.
Time + Zero speed mode:
The SOS function is activated after the speed goes below a
defined speed.
Time + Zero speed + Ramp mode:
The SOS function is activated after the speed goes below a
defined speed. The ramp is monitored by the option board.
NOTE! If the Time + Zero speed + Ramp mode is used and
the controlled ramp down not following the intended ramp
is a critical enough deviation, re-execute this test to
determine that the monitored ramps are sufficient for the
process.
5 Make sure that the drive is in READY state.
Applicable faults are shown:
Warning: F46 SafetyRequest, subcode: SQS (4).
Warning: F47 SafetyReached, subcode: SQS (4).
NOTE! The faults that are shown and their type (Fault or
Warning) depend on the settings of the AC drive.
NOTE! F47 SafetyReached, subcode: SQS (4), indicates that
the SQS-SS2 safety function is Reached and that the SOS
safety function is active.
6 Make the motor rotate so that the rotation exceeds the SOS
position deviation limit.
7 Make sure that the position deviation at which the SOS
safety function detects the rotation violation is valid for the
process.
The expected violations:
Warning: F48 SafetyViolat, Safety function: SOS, Fault
number: 1.
8 Make sure that the drive is in NOT READY state.
9 Deactivate the SQS function.
Send a reset signal to the option board.
NOTE! When a safety function is deactivated, and there is a
valid RUN request in the AC drive, the AC drive can start
running unexpectedly.
10 Make sure that the drive is in READY state.
VACON 17