ABB ACS880 Series, Application Manual, Page: 31 / 44

Parameter settings 31
SS1 ramp parameters in the drive/inverter module
You must set these parameters only for the SS1 function.
If FSO parameter 200.112 SAR1 ramp time to zero is set to 0 , drive parameters define the
stop ramp that is used in the SS1 function:
•
21.04 Emergency stop mode is set to value Eme ramp stop (Off3)
•
23.23 Emergency stop time is set to a suitable value.
Also in this case, the FSO module monitors the actual stop ramp (ramp monitoring or time
monitoring). For more information, see the firmware manual.

Safety pulse encoder interface
If you use a safety pulse encoder and the FSE-31 module with the FSO-21 module,
configure the encoder interface according to the instructions in
FSO-21 safety functions
module user’s manual (3AXD50000015614 [English]).
Mechanical brake control
If you use a mechanical brake with the motor thermal protection circuit, pay special
attention to the control of the mechanical brake.
If the motor deceleration by the mechanical brake causes extra heat generation in the
ATEX area, make sure that the use of the brake does not rise the temperature excessively.
In this case, make sure that the mechanical brake is activated only at the zero speed (see
parameters
SBC.11 STO SBC usage , SBC.15 SSE/SS1 SBC speed and FSOGEN.51 or
FSOGEN.52 ).
In some cases you cannot use the brake for the motor deceleration when the motor
thermal protection circuit has tripped, and the motor temperature is excessive already.
For more information, see the drive firmware manual (or the FSO user’s manual if you use
the Safe brake control (SBC) function of the FSO module).
SBC usage
SBC.15 SSE/SS1 SBC speed 0 rpm Sets the absolute speed below which the FSO module
activates the brake (SBC) while ramping.
0 rpm : The feature is not in use.
In the safety functions described in this guide, this
feature is not used. Make sure that the value is
0 rpm .
Index Name Example
value Description