Sms Function - ABB ACS880-07 User Manual

Example 5: Monitoring and modoff delay time disabled
The operation of the SLS function in case the modulation of the drive is lost during the
deceleration ramp with Monitoring and modoff delay time disabled selected (parameter
SLSx.05 is set to Monitoring and modoff delay time disabled) is described in the time diagram
and table below.
Motor speed
B Actual motor speed (coasting after modoff)
C SLS trip limit
D SLS limit
￭

SMS function

The FSO module includes two versions of the SMS function. This manual describes version
1. Version 2 of the SMS function is similar to the SLS function except that it can only be
configured to be continuously on or off.
The user activates the desired version of the SMS function and sets the SMS maximum
and minimum speed limits at the start-up. For more information, see section Parameter
settings and FSO module user's manual.
If the motor speed reaches the SMS trip limit positive or negative, the FSO module activates
the Safe stop emergency (SSE) function. Depending on parameter settings, the FSO module
activates the drive STO function either immediately or after a deceleration ramp. The motor
coasts to a stop or decelerates to zero speed.
This time scheme diagram illustrates the operation of the SMS function (version 1).
B
Option description 27
C
D
Time
SLS request
SLSx.04 time
delay monitoring
Drive modulation
STO.14 delay
SLS indication