￭ 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 and opens the main contactor/breaker. The drive STO
function is active until the fault is 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.
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 is 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. See section Resetting the FSO
module (page 38).
For more information, see the drive firmware manual, FSO-21 safety functions module user’s
manual (3AXD50000015614 [English]) and FSE-31 pulse encoder interface module user’s
manual (3AXD50000016597 [English]).
￭ Safety encoder
Internal faults of the safety encoder and the FSE-31 module will cause the FSO module to
go into Fail-safe mode.
The STATUS/FAULT LED of the FSO module is red and the ENC STATUS LED of the
FSE-31 module is off until the fault is repaired. Also the drive indicates a safety encoder
fault.
To exit the Fail-safe mode, remove the cause of the fault and reset the FSO module. See
section Resetting the FSO module (page 38).
The safety encoder goes into Safe state. To exit Safe state, remove the cause of the fault
and reboot the safety encoder (for example, by switching the power off and on).
For more information, see the drive firmware manual, FSO-21 safety functions module user’s
manual (3AXD50000015614 [English]) and FSE-31 pulse encoder interface module user’s
manual (3AXD50000016597 [English]).
￭ STO function in the drive
The STO function in the drive has internal fault diagnostics and a fault reaction function,
which causes a fault trip if it detects a redundancy fault of STO control signals or an internal
failure. See the hardware and firmware manuals of the drive.
Option description 39
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