Function Indications - ABB FSO-21 User Manual

52 Safety functions
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Function indications

The logic state of output indication signals can be configured to be active low or
active high.
STO, SS1, SSE, POUS
States of the configured and connected functions are indicated with FSO digital
outputs and fieldbus status signals when the function is started:
• Stopping functions (SSE and SS1) are always started and indicated immediately
(the monitoring method depends on the configuration)
(parameters SSE.21 SSE output
• The drive STO state is indicated when the drive STO circuit is open
(parameter STO.21 STO
Note: When the SBC is activated before the drive STO, the drive STO is indicated
after a delay (parameter
• POUS function is indicated immediately when requested from an input
(POUS.21 POUS
• Ramp monitoring (SAR0 and SAR1, see section
not indicated.
The FSO module switches off the digital output indications (SSE, SS1 and POUS
functions) when the function is acknowledged.
Stop completed indications are activated when the stopping function has completed,
but is not yet acknowledged. There are separate indications for each stopping
function STO, SSE and SS1 (parameters
SSE completed output,
them (parameter FSOGEN.11 Stop completed
the indications when the function is acknowledged.
The completed indication of the POUS function (parameter
completed output) is activated after the time defined by parameter
delay for completion
indication when the POUS request is removed.
SLS, Variable SLS
• SLS indication starts when the motor speed is in the monitored range. The FSO
module switches off the indication when the function is acknowledged or the
monitored speed exceeds the user-defined limit (this also causes the SLS to trip,
that is, the FSO module activates the SSE function).
SSM
• SSM indication starts when the motor speed is in the monitored range. The FSO
module switches off the indication when the monitored speed exceeds the
configured limit.
and
output).
SBC.12 STO SBC
output).
SS1.22 SS1 completed
has passed. The FSO module switches off the completed
SS1.21 SS1 output).
delay).
Configuring SAR
STO.22 STO completed
output) and one common for all of
output). The FSO module switches off
POUS.22 POUS
on page 294) is
output, SSE.22
POUS.13 POUS