ABB ACS880 Series Manual page 42

42 Parameter settings
Index Name
SSE.16 SSE ramp zero
speed delay for STO
SBC usage
SBC.15 SSE/SS1 SBC speed
SAR0 ramp settings
200.102 SAR0 ramp time to
zero
200.202 SAR speed scaling
SARx.02 SAR initial allowed
range
Example value Description
0 ms Sets an extra delay time for the drive STO
activation at the zero speed in the SSE
function.
With this parameter, the FSO module delays
the STO activation so that the drive is able
to reach the shaft zero speed before the
FSO module activates the STO function.
The delay counter starts when the motor
speed reaches the zero speed limit (para-
meter FSOGEN.52). After this delay has
elapsed, the FSO module activates the drive
STO. You can use this parameter when the
motor rotates a high inertia load.
Note: The FSO module activates the drive
STO immediately if the drive stops modulat-
ing before this delay has passed (that is, the
motor actual speed reaches 0 rpm).
This parameter is relevant only if parameter
SSE.13 SSE function is set to Emergency
ramp.
0 rpm Sets the absolute speed below which the
mechanical brake of the motor is activated
while ramping.
0 rpm: The feature is not in use.
In this manual, it is assumed that you do not
use a brake. If you do, you must take care
of its on/off control by the FSO module and
change this and other settings. See the FSO
module user's manual.
1000 ms Sets the target time for the reference emer-
gency stop ramp SAR0 (used in the SSE
function).
Target time = Time in which the drive decel-
erates the motor from speed 200.202 SAR
speed scaling to zero.
This parameter is relevant only if parameter
SSE.13 SSE function is set to Emergency
ramp. Adjust the default value when neces-
sary.
1500 rpm Sets a speed value that the FSO module
uses as a reference point in ramp parameter
calculations (both SAR0 and SAR1 ramps).
Adjust the default value when necessary.
100 ms Sets the initial allowed range for the
SAR0/SAR1 ramp.
This parameter moves the location of the
maximum monitoring ramp forward on the
time axis, when monitoring is started. The
slope of the ramp stays the same as defined
with parameters 200.202 and SARx.12
(SAR0) or SARx.22 (SAR1).
For more information, see the FSO module
user's manual.