Safety functions 159
SLS reaction if modulation is lost with Modoff delay time - modulation returns
before modoff delay
The operation of the SLS function in case the modulation of the drive is lost during the
deceleration ramp and the modulation returns before the Modoff delay time has run
out with Modoff delay time selected (parameter SLSx.05 is set to Modoff delay time)
is described in the time diagram and table below.
B Actual motor speed (coasting after modoff)
C SLS trip limit
DSLS limit
Motor speed
Time
1 65432
B
Drive modulation
SLS request
SLS monitoring
SLS indication
SLSx.06 Modoff time
delay monitoring
SLSx.04 time
delay monitoring
C
D
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