ABB ACS880 Series Firmware Manual page 258

258 Parameters
No. Name/Value
31.22 STO indication
run/stop
Fault/Fault
Fault/Warning
Description
Selects which indications are given when one or both Safe
torque off (STO) signals are switched off or lost. The
indications also depend on whether the drive is running or
stopped when this occurs.
The tables at each selection below show the indications
generated with that particular setting.
Notes:
• This parameter does not affect the operation of the STO
function itself. The STO function will operate regardless of
the setting of this parameter: a running drive will stop upon
removal of one or both STO signals, and will not start until
both STO signals are restored and all faults reset.
• The loss of only one STO signal always generates a fault
as it is interpreted as a malfunction.
For more information on the STO, see the Hardware manual
of the drive.
Inputs
Indication (running or stopped)
IN1 IN2
0 0
Faults 5091 Safe torque off
0 1
Faults 5091 Safe torque off
1 0
1 1
Inputs
IN1 IN2 Running
Fault 5091 Safe torque
0 0
Faults
0 1 torque off
Safe torque off 1 loss
Faults
1 0 torque off
Safe torque off 2 loss
1 1
Fault 5091 Safe torque off
and
torque off 1 loss
and
torque off 2 loss
(Normal operation)
Indication
Stopped
Warning
off torque off
Warning
5091 Safe
torque off
and FA81
FA81 Safe torque off 1
Warning
5091 Safe
torque off
and FA82
FA82 Safe torque off 2
(Normal operation)
Def/FbEq16
Fault/Fault
0
FA81 Safe
FA82 Safe
1
A5A0 Safe
A5A0 Safe
and fault
loss
A5A0 Safe
and fault
loss