Omron CJ1G-CPU series, Programming Manual

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Diagnostic Functions Section 6-7
1,2,3... 1. The FAL Error Flag (A40215) or FALS Error Flag (A40106) is turned ON.
2. The corresponding error code is written to A400.
3. The error code and time of occurrence are stored in the Error Log.
4. The error indicator on the front of the CPU Unit will flash or light.
5. If FAL(006) has been executed, the CPU Unit will continue operating.
If FALS(007) has been executed, the CPU Unit will stop operating. (Pro-
gram execution will stop.)
Operation of FAL(006)
When execution condition A goes ON, an error with FAL number 2 is gener-
ated, A40215 (FAL Error Flag) is turned ON, and A36002 (FAL Number 2
Flag) is turned ON. Program execution continues.
Errors generated by FAL(006) can be cleared by executing FAL(006) with FAL
number 00 or performing the error read/clear operation from a Programming
Device (including a Programming Console).
Operation of FALS(007)
When execution condition B goes ON, an error with FALS number 3 is gener-
ated, and A40106 (FALS Error Flag) is turned ON. Program execution is
stopped.
Errors generated by FAL(006) can be cleared by eliminating the cause of the
error and performing the error read/clear operation from a Programming
Device (including a Programming Console).
6-7-4 Failure Point Detection
FPD(269) performs time monitoring and logic diagnosis. The time monitoring
function generates a non-fatal error if the diagnostic output isn’t turned ON
within the specified monitoring time. The logic diagnosis function indicates
which input is preventing the diagnostic output from being turned ON.
Time Monitoring Function
FPD(269) starts timing when it is executed and turns ON the Carry Flag if the
diagnostic output isn’t turned ON within the specified monitoring time. The
Carry Flag can be programmed as the execution condition for an error pro-
cessing block. Also, FPD(269) can be programmed to generate a non-fatal
FAL error with the desired FAL number.
When an FAL error is generated, a preset message will be registered and can
be displayed on a Programming Device. FPD(269) can be set to output the
results of logic diagnosis (the address of the bit preventing the diagnostic out-
put from being turned ON) just before the message.
The teaching function can be used to automatically determine the actual time
required for the diagnostic output to go ON and set the monitoring time.
FAL 002 #0000
FALS 003 #0000