Parameters For The Sto Function - ABB ACS880-07 User Manual

34 Option description
Index Name
FSOGEN.52 Zero speed with en-
coder
FSOGEN.62 STO indication
safety limit

Parameters for the STO function

These parameters are related to the STO function of the FSO module. The SLS function
activates the STO function if a ramp monitoring limit is reached during deceleration. The
FSO module can also activate the STO function in internal fault situations.
Index Name
STO.02 STO acknowledge-
ment
Example value Description
10 rpm Sets the general zero speed limit for safety
functions when a safety encoder is in use.
This parameter is relevant when the SSE
function is activated and if parameter
SSE.13 SSE function is set to Emergency
ramp. See section Parameters for the SSE
function.
Note: You cannot set trip limits below this
value.
Fault Sets the type of the indication that the FSO
module generates for the limit hits of the
SLS1...SLS4 and SMS functions and for
limit hits during ramp and time monitoring
of safety ramps SAR0 and SAR1.
SLS: When the motor speed does not follow
the deceleration ramp, the FSO module
activates the STO function and generates
this user-defined indication. When the motor
speed reaches the SLS trip limit, the FSO
module activates the SSE function and
generates this user-defined indication.
SMS: When the motor speed reaches the
SMS trip limit positive or below the SMS
trip limit negative, the FSO module activates
the SSE function and generates this user-
defined indication.
SSM: This value has no effect in the opera-
tion.
Check the default setting and adjust if ne-
cessary. If you select Fault, you must reset
the drive before you can restart it.
Example value Description
Automatic Sets the acknowledgement method used
in the STO, SSE and SS1 functions.
Automatic: The FSO module generates the
STO acknowledgement signal automatic-
ally, and the user does not have to press a
reset button (see parameter FSOGEN.42
Acknowledgement button input).
Note: The default value after factory reset
is Manual. Always check this parameter
after factory reset.