ABB FSO-21 - SLS Reaction When Modulation Is Lost During Deceleration Ramp, with Time Monitoring

Safety functions 157
 SLS reaction when modulation is lost during deceleration ramp,
with time monitoring
SLS reaction if modulation is lost with Modoff delay time
The operation of the SLS function in case the modulation of the drive is lost during the
deceleration ramp with Modoff delay time selected (parameter SLSx.05 is set to
Modoff delay time) is described in the time diagram and table below. For
configuration, see section How to configure SLS function behavior when drive
modulation is lost on page 376.
B Actual motor speed (coasting after modoff)
C SLS trip limit
DSLS limit
SLS indication
Motor speed
Time
1 4 532
STO active
Drive modulation
SLS request
SLSx.06 Modoff time
delay monitoring
SLSx.04 time
delay monitoring
C
D
B
STO.14 delay