Led Error Indicators - Omron CJ1W-NC271 - 12-2009 Operation Manual

LED Error Indicators

12-3 LED Error Indicators
12-3-1 Error Indicators at Powerup
Indicator status
RUN ERC ERH
Not lit Not lit Not lit
Not lit Not lit Lit
The status of the LED indicators on the front of the PCU can be used to diag-
nose the following errors.
NCF71
RUN
MLK
ERC
ERH
ERM
RUN: The PCU is operating.
ERC: An error has occurred in the PCU.
ERH: An error has occurred in the CPU Unit.
ERM: An error has occurred in the MECHATROLINK device.
MLK: Indicates MECHATROLINK communications status
The indicator displays indicate the first error that is detected.
If the cause of an error has been cleared using ALARM RESET when two or
more errors have occurred at the same time, the PCU will detect the next error
with the highest priority and the indicator display will switch to show the new
error. If multiple errors occur with the same priority level, the error for the
smaller axis number will be displayed first.
Category
ERM MLK
Not lit Not lit CPU Unit power
interruption
Unit system
error
Not lit Not lit Setting error
Data transfer
error
Probable cause of
error
Power is not being sup- Check the power sup-
plied correctly to the ply voltage being sup-
CPU Unit. plied to the CPU Unit
and make sure the cor-
rect power is being
supplied.
The PCU system is not Make sure that the
operating correctly. PCU is installed cor-
rectly, and turn the
power OFF and ON
again. If the error
occurs again, replace
the PCU.
The PCU's unit number After changing the unit
is the same as another number, cycle the
Unit. power and create the I/
O tables from the CPU
Unit.
The PCU is not regis- Create the I/O tables
tered in the CPU Unit's for the CPU Unit again.
I/O tables, or the regis-
tered status does not
match.
The transfer of data Make sure that the
between the PCU and PCU is installed cor-
CPU Unit could not be rectly, and turn the
executed correctly. power OFF and ON
again. If the error
occurs again, replace
the PCU or CPU Unit.
Section 12-3
Countermeasure
485