386 Configuration
2. Modulation is lost. Motor starts to coast to a stop. FSO stores last valid safe
speed estimation value. SLS ramp monitoring limit (SAR1) is kept active also
when modulation is lost.
3. Modulation of the drive has not returned. If SLSx.05 is set to Monitoring active,
SAR1 monitoring limit hit is generated based on the last valid speed estimate of
FSO.
4. STO.14 delay starts when drive modulation is lost. If modulation does not return,
SLS indication goes on after STO.14 delay has elapsed.
When drive modulation is lost, last valid speed estimate is stored to FSO module until
modulation comes back or monitoring limit is reached. Ramp monitoring is kept active
also when modulation is lost during SLS deceleration ramp. The ramp monitoring is
activated when SLS is requested.
Note: It is also possible to use fixed delay time until tripping fault without time/ramp
monitoring by setting SLSx.05 to Modoff delay time and by setting a suitable delay
until tripping fault with SLSx.06. With value 0, the tripping fault is generated
immediately.
Note: SLSx.05 and SLSx.06 are used only with speed estimate and only with
SLS1…SLS4 and Variable SLS functions in a situation where drive modulation is lost
during deceleration to SLS speed.
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