Omron NJ Series Troubleshooting Manual page 37

First digit of the
code (hex)
0
1
2
3
4
5
6
7
8
9
Relationship between Event Codes and Error Codes
In addition to the event codes that indicate errors, the function modules and Units have their own
error codes. If there are corresponding event and error codes, you can tell what the other code is if
you know either one of them. This allows you to know when the same error is being given when you
check errors with more than one method.
The following table shows the relationship between the error codes and event codes.
Error code (4-digit hexadecimal)
Classification
Error codes in the
Motion Control
Function Module
Error codes for basic
instructions
Error codes in CJ-
series Special Units
* The following are system-defined variables for motion control:
_MC_COM.PFaultLvl.Code
_MC_COM.MFaultLvl.Code
_MC_COM.Obsr.Code
_MC_AX[0..63].MFaultLvl.Code
NJ-series Troubleshooting Manual (W503)
Classification
Hardware errors
Data errors
Hardware setting errors
Configuration errors
Software errors
User software errors
Observation errors
Control errors
Communications errors
Information
Used in Upper 4 digits
• ErrorID output Error code
variable for motion
control instruc-
tions
• System-defined
variables for
motion control*
ErrorID output vari- 5401 hex
able for basic
instructions
Error logs from CJ- 0000 hex
series Special Units
Variable
MC Common Partial Fault Code
MC Common Minor Fault Code
MC Common Observation Code
Axis Minor Fault Code
Meaning
An error caused by a hardware problem such as an inter-
nal part malfunction, contact failure, temperature error,
undervoltage, overvoltage, or overcurrent.
An error caused by incorrectly saved data or data cor-
ruption in the Controller.
An error caused by incorrect handling of hardware set-
tings (e.g., hardware switches) or restrictions (e.g., Unit
assignment locations).
An error caused by incorrect parameter values, parame-
ters and hardware configurations that do not match, or
configurations set by the user.
An error caused by Controller software.
An error that is caused by the user program. (For exam-
ple, an input value to an instruction that is out of range.)
An error that was detected in monitoring operation that
occurs due to user settings in the Controller. (For exam-
ple, if the task period is exceeded or if a position outside
of the motion range is detected.)
An error caused by a control process. (For example, if
the operating status does not meet the required condi-
tions or if the timing is incorrect.)
An error caused by communications with an external
device or host system.
Events that are classified as information and provide
information that do not indicate errors.
Corresponding event code
(8-digit hexadecimal)
Lower 4 digits
0000 hex
Error code
Error code
Name
1 Overview of Errors
Example: Event
code for an error
code of A123 hex
A123 0000 hex
5401A123 hex
0000A123 hex
1-11
1