Safety functions 181
Step Description
1 The user stops the motor.
2 The user activates the POUS function. The FSO activates the drive STO function and
starts a counter for time A. The POUS active indication (parameter POUS.21) and the
STO active indication (parameter STO.21) become active.
Note: If the user activates the POUS function when the motor is running, the FSO
activates the drive STO function, generates a fault (7A97) and the motor coasts to a
stop.
3 After time A has elapsed, the POUS completed indication becomes active (parameter
POUS.22).
Note: Connect the POUS indication lamp to this indication signal.
4 The user removes the POUS request. The POUS completed indication is deactivated.
The acknowledgement becomes allowed.
Note: If the user activates the POUS request again before the POUS function has been
acknowledged, the counter for time A is restarted and the POUS completed indication
is activated after this delay.
5 The user acknowledges the POUS function. The POUS active indication goes off. The
FSO deactivates the drive STO function and the user can restart the motor.
Note: If automatic acknowledgement is used, this happens already when the POUS
request is removed (step 4).
6 The user starts the motor.
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