Omron CS1W-NC113 Manual page 296

LED Error Indicators
LED
R E E S D X
U R R E A
N C H N T
S A
f F f F F F
f f F l l l
f f F l l F
286
Error Error
Y Z U
CPU error
F F F
Parameters
F F F
destruction
Data destruction
F F F
Cause Cause
The CPU Unit has stopped
because the watchdog
timer turned ON.
A CPU bus error has been
detected.
The CPU Unit did not
perform END refresh
processing within the cyclic
service monitor time.
A fatal error occurred in the
CPU Unit.
When using the axis
parameters saved in the
PCU, the parameters saved
in flash memory have been
lost. It is possible that,
while saving to flash
memory, the PCU's power
supply was interrupted,
there was noise, or there
was an error in flash
memory.
The following data saved in
flash memory has been
lost: Zones, positioning
sequences, speeds,
acceleration/deceleration
times, positions, dwell
times.
It is possible that, while
saving to flash memory, the
PCU's power supply was
interrupted, there was
noise, or there was an error
in flash memory.
Section 11-3
Remedy Remedy
Check that the Backplane,
CPU Unit, and PCU are all
mounted securely, and
reset the power supply.
If th If the same error occurs
repeatedly, replace the
Backplane, CPU Unit, or
PCU.
In the system settings for
the CPU Unit, check that
the END refresh has not
been disabled. If it has
been disabled, enable it,
and reset the power supply.
Increase the CPU Unit's
cycle monitor time, and
reset the power supply
again.
Even if this error is
detected, it will not affect
PCU operation. Also, once
END refresh is enabled,
the ERH LED indicator will
turn OFF.
Remove the cause of the
error at the CPU Unit.
Once the cause is
removed, normal status will
be restored, and the ERH
LED indicator will turn OFF.
In this condition, only the
data transfer (read and
write) and data save
operations can be
performed. The PCU's axis
parameters and data are all
returned to their default
values. After transferring
the parameters again for all
axes, save the parameters
and either reset the power p
supply or restart the PCU. C
If the error persists, replace
the PCU.