ABB ACS880 Firmware Manual page 693

Code Event name /
(hex) Aux. code
FA82 Safe torque
off 2 loss
FA90 STO
diagnostics
failure
FB11 Memory unit
missing
Cause
Safe torque off function is active, ie.
STO circuit 2 is broken.
SW internal malfunction.
• No memory unit is attached to
the control unit.
• The memory unit attached to the
control unit is empty.
Fault tracing 693
What to do
When converted into a 32-bit binary
number, the bits of the code indicate
the following:
31...28: Number of faulty inverter
module (0...11 decimal). 1111: STO_ACT
states of control unit and inverter
modules in conflict
27: STO_ACT state of inverter modules
26: STO_ACT state of control unit
25: STO1 of control unit
24: STO2 of control unit
23...12: STO1 of inverter modules 12...1
(Bits of non-existing modules set to
1)
11...0: STO2 of inverter modules 12...1
(Bits of non-existing modules set to
1)
Check safety circuit connections. For
more information, see appropriate
drive hardware manual and
description of parameter
indication run/stop (page
Check the auxiliary code, The code
contains location information,
especially with parallel-connected
inverter modules.
When converted into a 32-bit binary
number, the bits of the code indicate
the following:
31...28: Number of faulty inverter
module (0...11 decimal). 1111: STO_ACT
states of control unit and inverter
modules in conflict
27: STO_ACT state of inverter modules
26: STO_ACT state of control unit
25: STO1 of control unit
24: STO2 of control unit
23...12: STO1 of inverter modules 12...1
(Bits of non-existing modules set to
1)
11...0: STO2 of inverter modules 12...1
(Bits of non-existing modules set to
1)
Contact your local ABB representative.
• Power down the control unit.
Check that the memory unit is
properly inserted into the control
unit.
• Power down the control unit.
Attach a memory unit (with the
appropriate firmware) to the
control unit.
31.22 STO
370).