ABB ACS880 Series, Application Manual, Page: 28 / 44

28 Parameter settings

Parameters for the STO function
These parameters are related to the STO function of the FSO module. With stop category
0, the FSO module activates the STO function in overtemperature situations.
In addition,
the FSO module can activate the STO function in fault situations.
Index Name Example
value Description
STO.02 STO
acknowledgement Automatic
or
Manual Sets the acknowledgement method used in the STO, SSE and
SS1 functions.
Automatic : The FSO module resets the STO function
automatically after the STO request have been removed.
Manual : The FSO module reads the external
acknowledgement signal through the digital input defined by
parameter
FSOGEN.42 . In the safety functions described in
this guide, you can use this setting to implement a manual
reset for the motor temperature protection function in the FSO
module (see section
Resetting the safety function on
page 19 ).
STO.11 STO input A STO:
DI X113:1 &
X114:1
SS1: None Sets the digital input that is connected to the primary input of
the STO function.
Note : The default value after factory reset is DI X113:1 &
X114:1 . Always check this parameter after factory reset.
STO.12 STO input B None Sets the digital input that is connected to the secondary input
of the STO function.
STO.13 Restart delay after
STO
2000 ms Sets the time after which the restart of the drive is allowed
after the FSO module has activated the STO function and
opened the drive STO circuit. With this parameter, you can
allow a restart of the drive before the motor has stopped (fly-
start). This parameter is valid only if the STO function is
requested from STO input A (
STO.11 ) or STO input B
( STO.12 ).
STO function: Adjust the default value when necessary. If you
do not want to use the fly-start feature, set this parameter to
the same value as parameter
STO.14 .
SS1 function: This value has no effect.
STO.14 Time to zero speed
with STO or modoff
2000 ms Sets the time after which the acknowledgement is allowed
after coast stop in the STO and SSE functions
. Set this
parameter value to the estimated time in which the motor
coasts to a stop from the maximum speed.
STO function: This parameter sets the time after which the
STO function is completed. Parameter
STO.13 defines the
time after which the restart of the drive is allowed. Adjust the
value when necessary.
SS1 function: This parameter is used only when the motor
speed does not follow the ramp settings or the time monitoring
limit is exceeded and the FSO module activates the STO
function. Adjust the value when necessary.
When a safety encoder is used: This parameter is relevant
only if an encoder or FSE module failure occurs. The FSO
module goes into the Fail-safe mode and activates the STO
function. For more information, see the FSO-21 module user’s
manual.
Note : The default value after factory reset is 3,600,000 ms .
Always check this parameter after factory reset.
SBC usage
SBC.11 STO SBC usage None Sets how the mechanical brake is used together with the STO
function.
In the safety functions described in this guide, this feature is
not used. Make sure that the value is
None .