Omron CS1W-MC221 -, Operation Manual

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System Error Codes Section 12-3
12-2-1 Errors During Initial Processing
The following table shows the errors that occur during the MC Unit’s initializa-
tion processing.
12-2-2 Errors During Normal Operation
Error codes are explained in 12-3 System Error Codes to 12-5 Axis Error
Codes .
The error code that occurs first will be output to word n+11 (MC221) or n+19
(MC421) in the PLC Interface Area.
12-3 System Error Codes
When a system error occurs, the Error Flag turns ON in the PLC Interface
Area and an error code is output. With the MC221, bit 14 of word n+10 turns
ON, and a 4-digit error code is output in hexadecimal to word n+11. With the
MC421, bit 14 of word n+18 turns ON, and a 4-digit error code is output in
hexadecimal to word n+19. The meanings of the error codes are explained in
the error code tables provided on the following pages.
Explanation of Tables Under the Code heading, the 4-digit hexadecimal code that is output by the
MC Unit is given first. The number given below it in parentheses is the way it
appears when decimal display is selected at the Programming Console.
RUN ERC ERH XCCW XCW YCCW YCW Error Probable causes Remedy
OFF OFF OFF OFF OFF OFF OFF Watchdog timer
timeout error The MC Unit’s watchdog
timer has timed out. Replace the
MC Unit.
OFF OFF ON OFF OFF OFF OFF Setup error One of the following
setup errors occurred:
Illegal unit number
Unit number duplication
Cyclic initial error
Unit number setting error
Set the
correct unit
number and
turn ON the
power again.
OFF ON ON OFF OFF OFF OFF Unit classification
error The Unit classification
was incorrectly set. Replace the
MC Unit.
OFF ON OFF ON OFF OFF OFF EEPROM error An error occurred in
EEPROM.
OFF ON OFF OFF ON OFF OFF RAM error An error occurred in
RAM.
OFF ON OFF OFF OFF ON OFF CPU error An error occurred at the
CPU.
OFF ON OFF OFF OFF OFF ON System software error The system software is
damaged.
RUN ERC ERH XCCW XCW YCCW YCW Error Probable causes Remedy
ON OFF OFF --- --- --- --- (Normal) --- ---
ON OFF ON OFF OFF OFF OFF PLC error One of the following errors
occurred at the CPU Unit:
Watch dog timer operation
Bus error
Cyclic monitor error
Extend the cyclic
monitor time. If the
error recurs, replace
the CPU Unit.
ON ON OFF OFF OFF OFF OFF Unit error An error occurred at the
MC Unit. Check the error
code and apply the
appropriate remedy.
ON ON OFF OFF OFF ON OFF CPU error An error occurred at the
MC Unit’s CPU. Replace the MC
Unit.