ABB ACS880 User Manual page 40

40 Parameter settings
Index Name
SLSx.02 SLS acknowledge-
ment
SLSx.03 SLS activation monit-
oring method
SLSx.04 SLS time delay
SLSx.05 SLS ramp modoff re-
action
SLSx.06 SLS ramp modoff
delay time
Example value Description
Automatic Sets the acknowledgement method used in
the SLS1...4 functions.
Automatic: The FSO module generates the
SLS acknowledgment signal automatically
after the SLS request is removed and the
SLS limit is achieved. The user does not
have to press a reset button (see parameter
FSOGEN.42 Acknowledgement button in-
put).
Time Sets the monitoring method that is used in
SLS activation.
or
Time monitoring: The inverter unit (paramet-
Ramp
er 23.13 Deceleration time 1 or 23.15 Decel-
eration time 2) defines the deceleration ramp
and it is monitored with parameter SLSx.04
SLS time delay.
Ramp monitoring: SAR1 parameters define
the deceleration ramp and monitoring limits.
See parameters 200.112, SARx.21,
SARx.22 and SARx.02.
For option +Q966, ABB sets this parameter
to value Ramp at the factory. Adjust the de-
fault value when necessary.
4000 ms Sets the SLS monitoring time after which
the FSO module activates the SLS monitor-
ing after the SLS request. This parameter
is relevant only if time monitoring is used
(parameter SLSx.03 SLS activation monitor-
ing method is set to Time).
Note: With time monitoring, when parameter
SLSx.05 is set to Monitoring active and
Modoff delay time, parameters SLSx.04 and
SLSx.06 must be set to a shorter time than
parameter STO.14. If they are not set to a
shorter time than STO.14, STO is not activ-
ated due to a limit hit when drive modulation
is lost with SLS function.
Modoff delay time Selects the fault reaction in case the drive
modulation is lost during the SLS decelera-
tion ramp, when SLS is activated from speed
which is higher than SLS limit speed.
For more information, see FSO module
user's manual.
Note: If encoder feedback is used, paramet-
er SLSx.05 has no effect.
0 ms Time to trip when modulation is lost.
Note: SLSx.06 time must be set to a shorter
time than STO.14. If it is not set to a shorter
time than STO.14, STO is not activated due
to limit hit when drive modulation is lost with
SLS function.
Note: If encoder feedback is used, paramet-
er SLSx.06 has no effect.