Description of Fault Codes
‑57‑
The fixed stopper is not found within the range of the displacement reference.
Cause
Troubleshooting
Solution
The fixed stopper is not
found within the range of
the displacement reference.
Check whether the stopper
is within the range of the
operation reference.
Set the displacement
reference (H27.17–H27.47)
properly.
● E550.9: fixed stopper beyond the window
Description:
The position feedback fluctuation exceeds the monitoring window after the fixed
stopper is found.
Cause
Troubleshooting
Solution
The position feedback
fluctuation exceeds the
monitoring window (H28.64)
after the fixed stopper is
found.
Check whether H28.64 is set
properly.
Set a proper monitoring
window value.
● E551.1: program block stop exception
Description:
The switchover condition for the last block is not "stop".
Cause
Troubleshooting
Solution
The switchover condition for
the last block is not "stop".
Check whether bit4–7 of the
task mode (H18.16–28.31) of
the last block in operation is
0.
Setting switchover condition
for the last block to "stop".
● E551.3: jump block not exist
Description:
The block number designated by the jump task does not exist.
Cause
Troubleshooting
Solution
The block number
designated by the jump task
does not exist.
Check whether the setting
range of corresponding task
parameters (H28.32–H28.62)
of the jump block is 0–15.
Set task parameters for the
jump block properly.
● E602.0: Angle auto‑tuning failure
Description:
Unusual jitter occurs on the encoder feedback during angle auto‑tuning.
Cause
Troubleshooting
Solution
The data fed back by the
encoder is abnormal.
Check if the encoder
communication is being
disturbed.
Check the wiring of the
encoder.
● E602.2: U/V/W phase sequence reversed