Fault Reaction Function; Fso Module; Fse-31 Module - ABB ACS880-07 User Manual

Note: If the motor speed goes above the SLS trip limit, the FSO module activates the
SSE function. The motor coasts to a stop or decelerates to zero speed according to
FSO parameter settings. The FSO module activates the drive STO.
3. Normal operation resumes after the user turns the SLS activation switch [SLS] to the
normal position. The SLS indication goes off. If the motor speed reached the SLS trip
limit during SLS monitoring, the user must reset the drive if the STO indication parameter
(FSOGEN.62 or 31.22) has been set so that a fault is generated. See chapter Parameter
settings.

Fault reaction function

Definition: The safety function has a 'fault reaction function' that attempts to bring the
systems to a safe state if it detects any failure within the safety system:
• a short or open circuit or redundancy failure of the SLS activation switch wiring chain,
or
• any internal failure within the FSO or FSE-31 modules, the safety encoder or the drive
STO.
This section describes the fault reaction functions in the FSO and FSE-31 modules, the
safety encoder and the drive STO.
￭

FSO module

The fault reaction function of the FSO module trips the drive if it detects a failure. The FSO
module activates the STO or Safe stop emergency (SSE) function. This activates the drive
STO function. The drive STO function is active until the fault has been repaired.
The FSO module goes into Fail-safe mode. The STATUS/FAULT LED of the FSO module
is red until the fault has been repaired.
To exit the Fail-safe mode, remove the cause of the fault and reset the FSO module by
switching the power off and on, by pressing the Boot FSO button on the Safety view of Drive
composer pro or with drive parameter 96.09 FSO reboot.
For more information, see the drive firmware manual and the FSO module user's manual.
￭

FSE-31 module

When a safety function is active, the fault reaction function of the FSO module trips the drive
if it detects a failure in the FSE-31 module. The FSO module activates the STO function.
This activates the drive STO function. The drive STO function is active until the fault has
been repaired.
When there are no active safety functions, the fault reaction function depends on the value
of FSO parameter S_ENCGEN.11 FSE diagnostic failure reaction (see section General
parameters).
The FSO module goes into Fail-safe mode. The STATUS/FAULT LED of the FSO module
is red and the STATUS LED of the FSE-31 module is off until the fault has been repaired.
Also the drive indicates some of the FSE-31 module faults.
To exit the Fail-safe mode, remove the cause of the fault and reset the FSO module by
switching the power off and on, by pressing the Boot FSO button on the Safety view of Drive
composer pro or with drive parameter 96.09 FSO reboot.
Option description 31