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5-2-3
Preset Error
A Preset error is generated if a Circular or Linear Counter is preset with an invalid Preset Value (refer to
3-4 Digital Input Functions for more information about presetting). The Preset Value is invalid if it is out-
side the counting range of the Circular or Linear Counter.
Error Code 1
Error Code 2
0470
Counter No.
Clearing Preset error
A Preset error can be cleared by resetting or by presetting the Counter that generated a Preset
error, with a valid Preset Value. To reset a Counter refer to 3-6 Reset Counter. To preset a Counter
refer to 3-4 Digital Input Functions.
5-2-4
System Errors
When errors occur in the CPU Unit or on the I/O bus, the ERH-Indicator is turned ON.
At the occurrence of an I/O bus check error, an error code is stored in error codes 1 and 2.
Error Code 1
Error Code 2
0002
Monitoring time (ms)
000E
0000
Clearing System errors
Reset the Controller or turn ON the power supply again. If the error persists, then replace the CJ-
series CPU Unit.
CJ-series High-speed Counter Units Operation Manual for NJ-series CPU Unit(W492)
5 Error Processing, Maintenance and Inspection
Error
Description
Illegal Preset Value
The Linear Counter with the Counter No. as reported
in Error Code 2 is preset with an invalid Preset
Value.
Error
Description
CPU Unit Monitoring
This error occurs when there is no response from
Error
the CPU Unit within a specific period of time.
I/O Bus Check Error
An error has occurred on the I/O Bus causing the
High-speed Counter Unit to be in an undefined state.
On occurrence of an I/O Bus Check Error you can
configure the Outputs to keep their last state or to
have a predefined state (refer to 3-5-4 Output Con-
trol Configuration).
5
5-7
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