ABB ACS880 - Page 570

What to doCause
Event name /
Aux. code
Code
(hex)
Check resistor overload protection
function settings (parameters
43.6…43.10).
Check minimum allowed resistor value
for the chopper being used.
Check that braking cycle meets allowed
limits.
Check that drive supply AC voltage is not
excessive.
Check mechanical brake connection.Status of mechanical brake
acknowledgement is not as expected
during brake close.
Mechanical
brake closing
failed
A7A1
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake connection.Status of mechanical brake
acknowledgement is not as expected
during brake open.
Mechanical
brake opening
failed
A7A2
Check mechanical brake settings in
parameter group 44 Mechanical brake
control.
Check that acknowledgement signal
matches actual status of brake.
Check mechanical brake settings in
parameter group 44 Mechanical brake
Open conditions of mechanical brake
cannot be fulfilled (for example, brake
has been prevented from opening by
parameter 44.11 Keep brake closed).
Mechanical
brake opening
not allowed
A7A5
control (especially 44.11 Keep brake
closed).
Check that acknowledgement signal (if
used) matches actual status of brake.
Check the auxiliary code (format XX00
00YY). “XX” specifies the number of the
The hardware current/voltage setting of
an analog input (on an I/O extension
Extension AI
parameterization
A7AA
I/O extension module (01: parametermodule) does not correspond to
parameter settings.
group 14 I/O extension module 1, 02: 15
I/O extension module 2, 03: 16 I/O
extension module 3). “YY” specifies the
analog input on the module.
For example, in case of I/O extension
module 1, analog input AI1 (auxiliary
code 0000 0101), the hardware
current/voltage setting on the module is
shown by parameter 14.29. The
corresponding parameter setting is
14.30. Adjust either the hardware setting
on the module or the parameter to solve
the mismatch.
Note: Control board reboot (either by
cycling the power or through parameter
96.8 Control board boot) is required to
validate any changes in the hardware
settings.
Check the type and location settings of
the modules (parameters 14.1, 14.2,
15.1, 15.2, 16.1 and 16.2).
The I/O extension module types and
locations specified by parameters do not
match the detected configuration.
Extension I/O
configuration
failure
A7AB
Check that the modules are properly
installed.
570 Fault tracing