ABB ACS355 series User Manual page 353

CODE ALARM
2024 ENCODER ERROR
0309 bit 7
(programmable fault
function 5003)
2025 FIRST START
0309 bit 8
2026 INPUT PHASE
LOSS
0309 bit 9
(programmable fault
function 3016)
2029 MOTOR BACK EMF
0309 bit 12
2035 SAFE TORQUE
OFF
0309 bit 13
1)
Even when the relay output is configured to indicate alarm conditions (eg, parameter
RELAY OUTPUT 1
output.
CAUSE
Communication fault
between pulse
encoder and pulse
encoder interface
module or between
module and drive.
Motor identification
magnetization is on.
This alarm belongs to
normal start-up
procedure.
Intermediate circuit DC
voltage is oscillating
due to missing input
power line phase or
blown fuse.
Alarm is generated
when DC voltage
ripple exceeds 14% of
nominal DC voltage.
Permanent magnet
synchronous motor is
rotating, start mode 2
(DC MAGN) is
selected with
parameter 2101
START FUNCTION,
and run is requested.
Drive warns that
rotating motor cannot
be magnetized with
DC current.
STO (Safe torque off)
requested and it
functions correctly.
Parameter 3025 STO
OPERATION
react with alarm.
= 5 (ALARM) or 16 (FLT/ALARM)), this alarm is not indicated by a relay
WHAT TO DO
Check pulse encoder and its wiring,
pulse encoder interface module and
its wiring and parameter group
ENCODER
Wait until drive indicates that motor
identification is completed.
Check input power line fuses.
Check for input power supply
imbalance.
Check fault function parameters.
If start to rotating motor is required,
select start mode 1 (AUTO) with
parameter
Otherwise drive starts after motor has
stopped.
If this was not expected reaction to
safety circuit interruption, check
cabling of safety circuit connected to
STO terminals X1C.
is set to If different reaction is required, change
value of parameter
OPERATION.
Note: Start signal must be reset
(toggled to 0) if STO has been used
while drive has been running.
Fault tracing 353
50
settings.
2101 START FUNCTION.
3025 STO
1401