957
Failure Diagnosis Instructions Section 3-28
The following table shows relevant words and flags in the Auxiliary Area.
Precautions When the time monitoring function is being used, the execution condition for
FPD(269) must remain ON for the entire monitoring time set in T.
The execution condition for FPD(269) must be made up of a combination of
normally open and normally closed inputs.
The error-processing block is optional. When an error-processing block is
included, be sure to use outputs or other right-hand instructions. LD and LD
NOT cannot be used at this point.
FPD(269) can be used more than once in the program, but each instruction
must have a unique register (R) setting.
The monitoring time is refreshed only when FPD(269) is executed. If the cycle
time is longer than 100 ms, the monitoring time will not be refreshed normally
and FPD(269) will not operate correctly because the monitoring time is
updated in units of 100 ms.
Name Address Operation
FAL Error Flag A402.15 ON when a non-fatal (FAL) error is registered in time
monitoring.
Executed FAL
Number Flags
A360.01 to
A391.15
When a non-fatal (FAL) error is registered in time mon-
itoring, the corresponding flag will be turned ON. Flags
A360.01 to A391.15 correspond to FAL numbers 0001
to 01FF.
Error Log Area A100 to
A199
The Error Log Area contains the error codes and time/
date of occurrence for the most recent 20 errors,
including errors generated by FPD(269).
Error code A400 When an error occurs its error code is stored in A400.
The error codes for FAL numbers 0001 to 01FF are
4101 to 42FF, respectively.
If two or more errors occur simultaneously, the error
code of the most serious error will be stored in A400.
FPD Teaching
Bit
A598.00 Turn this bit ON when you want the monitoring time to
be set automatically (teaching function) when
FPD(269) is executed.
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