Error Codes
When there is an Error or Warning, the error code is stored in the System Data register SD1.
When an Error occurs during the operation, the CLICK PLC system goes to the STOP mode
immediately and the ERR LED on the PLC unit turns on. On the other hand, when a
Warning occurs during the operation, the CLICK PLC system stays in RUN mode and the
ERR LED on the PLC unit starts blinking.
In the error code tables that follow, the Category column indicates whether the error code is
an Error or a Warning. If any of the Warnings listed is critical for your control system, add an
additional ladder program to put the CLICK PLC system in STOP mode when that specific
Warning occurs. Here is an example.
Example
X102 turns on when the analog
I/O module in the I/O1 position is
missing external 24VDC input.
Error
Status
Error
Category
Code
Flag*
Name
I/O Module
101
SC20
Error
System
102
SC21
Config
Error
* The Status Flags are turned ON when the related errors occur.
Error code table continued on next page.
CLICK PLC Hardware User Manual, 6th Edition, Rev. F – C0-USER-M
PLC Error Codes
Causes
There are more than 8 I/O
modules.
At least one I/O module was
added to the CLICK PLC during
operation.
Error
An I/O module has failed.
The current system configuration
Error
does not match the configuration
saved in the project file.
Chapter 6: Troubleshooting
By turning the System Control bit
SC50 on, the CLICK PLC system
goes in the STOP mode.
Solutions
A CLICK PLC system can support up to 8 I/O modules.
Remove any excessive I/O modules.
Power off the CLICK PLC and check the connection of the
I/O modules. Then power on the CLICK PLC again. If the
problem remains, connect the CLICK software to the PLC
and check the System Configuration. If there is any I/O
module that is not shown in the System Configuration,
replace it.
Connect the CLICK software to the CLICK PLC and check
the system configuration. If there is any I/O module that
is used in the PLC system but not shown in the System
Configuration window, replace the I/O module.
Connect the CLICK software to the CLICK PLC and open
the System Configuration window. Modify the current
configuration of the CLICK PLC to match the configuration
in the project file, or uncheck the 'Start-up I/O Config
Check' option if you want to use the current configuration.
6–11
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