Omron CJ1W-MA - REV 10-2008, Operation Manual

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LED Error Indicators Section 12-3
12-3-4 Error Display for MECHATROLINK Communications Errors
This display occurs when MECHATROLINK communications are started (con-
nection established), or during communications when MECHATROLINK com-
munications are not connected correctly.
Check for disconnected, broken, or faulty contact in the MECHATROLINK
communications cables, and check the status (power interruption, etc.) of the
connected MECHATROLINK slave station devices.
Also check whether the actual connection status matches the connections
registered in the scan list.
Communications errors, scan list mismatches, or other error types, and the
axis in which the error has occurred can be checked using the PCU Error
Flags and error codes.
12-3-5 Error Display for PCU Settings and Operations
The indicator display shown in the above table indicates that illegal data is set
in the PCU parameters or an illegal operation has been attempted, such as
multistart.
This error will occur if a problem has occurred in the use of the PCU, which
requires the PCU settings or user program to be corrected.
The error types, and the axis in which the error has occurred can be checked
using the PCU Error Flags and error codes.
Indicator status Category Probable cause of
error
Countermeasure
RUN ERC ERH ERM MLK
Lit Flashing Not lit Lit Undeter-
mined Communica-
tions error MECHATROLINK com-
munications cannot be
performed correctly. Check the connection
of the MECHA-
TROLINK communica-
tions cable.
Scan list mis-
match The MECHATROLINK
slave station device
corresponding to the
axis number regis-
tered in the PCU scan
list is not connected. Check whether the set-
tings for the MECHA-
TROLINK
communications line
connection or slave
device's station
address match the set-
tings in the scan list.
Indicator status Category Probable cause of
error
Countermeasure
RUN ERC ERH ERM MLK
Lit Flashing Not lit Not lit Undeter-
mined Illegal operation An operation command
that cannot be exe-
cuted has been sent to
the PCU. Check the timing of the
last command and
change the operation
sequence.
Illegal data Illegal parameters have
been set for the PCU,
or an operation com-
mand has been sent
with illegal parameters.
Check the contents of
the last command, and
correct the contents of
the data.