158 Safety functions
Step Description
1 The SLS request is received. The motor speed is above the SLS trip limit positive (A).
The drive starts to ramp down the motor speed.
The FSO starts the SLS time delay (parameter SLSx.04).
The drive (parameter 23.13 or 23.15) defines the deceleration ramp until the speed
reaches the SLS limit.
2 The drive trips on a fault, there is a drive power loss, or user stops the drive by coast
stop.
SLS Modoff delay time starts (parameters SLSx.05 & SLSx.06).
STO.14 delay starts.
3 Modulation of the drive has not returned, the SLSx.06 Modoff delay time has run out,
and FSO activates STO function and STO indication (parameter STO.21 STO output).
See section Safe torque off (STO) on page 67 for more information on how to configure
the STO function.
4 SLSx.04 time delay for SLS time monitoring
5 SLS indication goes on after STO.14 delay has elapsed.
To Next Page
Loading...
