Omron CJ - INSTRUCTIONS Reference Manual page 1071

Time Monitoring Function
FPD(269) starts timing when it is executed (when execution condition A goes ON); it will generate a
non-fatal error and turn ON the Carry Flag if the diagnostic output is not turned ON within the specified
monitoring time.
Execution condition
for FPD(269)
Diagnostic output B
Carry Flag
Note The following processing will be performed when the Carry Flag is turned ON. (This processing will not be
performed if the FAL number is set to 000 in C.)
3 The FAL Error Flag (A402.15) will be turned ON. (PLC operation continues.)
4 The Executed FAL Number Flag for the specified FAL number will be turned ON. (Flags A360.01 to
A391.15 correspond to FAL numbers 001 to 1FF.)
5 The corresponding error code will be written to A400. Error codes 4101 to 42FF correspond to FAL num-
bers 001 to 1FF.
(If a more serious error has occurred (one with a higher error code) at the same time, the error code of the
more serious error will be stored in A400.)
6 The error code and the time/date that the error occurred will be written to the Error Log Area (A100
through A199).
7 The ERR Indicator on the CPU Unit will flash.
8 If the output mode has been set for bit address and message output (leftmost digit of C set to 8), the ASCII
message stored in R+2 through R+10 will be displayed as a non-fatal error message.
• 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.
Logic Diagnosis Function
Every cycle that the execution condition for FPD(269) is ON, FPD(269) determines which input bit is
causing the diagnostic output to be OFF and writes the bit's address to the register area beginning at R.
0.00 0.02
0.01 0.03
Logic diagnosis block
If input bits CIO 0.00 through CIO 0.03 are all ON in the following example, FPD(269) would determine
that the normally closed CIO 0.02 condition is causing output CIO 100 to remain OFF. FPD(269) would
turn ON the Bit Address Found Flag (bit 15 of R) and write the bit address to register words R+2 to R+4.
CS/CJ/NSJ Series Instructions Reference Manual (W474)
Monitoring
time (T)
Non-fatal error generated.
100
Logic diagnosis
execution condition
Note 1 The diagnostic output must go ON within
the monitoring time.
2 The teaching function can be used set the
monitoring time automatically.
3. Instructions
3
1033