Omron CJ1G-CPUxx, Instructions Manual

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Failure Diagnosis Instructions Section 3-30
Examples The following program example is used to demonstrate the operation of the
time monitoring function and logic diagnosis function. In this example, the
diagnostic output (CIO 020000) doesn’t go ON because CIO 010000 and
CIO 010003 remain OFF in the logic diagnosis execution condition.
Time Monitoring Function
If the diagnostic output (CIO 020000) doesn’t go ON within 10 seconds after
CIO 030000 and CIO 030001 are both ON, a non-fatal error will be generated
and the following processing will be performed.
1,2,3... 1. The Carry Flag is turned ON.
2. When the rightmost 3 digits of C specify an FAL number of 00A hex (10),
the corresponding Executed FAL Number Flag (A36010) will be turned
ON, the corresponding error code (410A) is written in A400, and the FAL
Error Flag (A40215) is turned ON.
Logic Diagnosis Function (C=000A)
Since the leftmost digit of C is 0 (bit address output mode) the PLC memory
address of CIO 010000 is output to D00303 and D00302. (CIO 010000 is on a
higher instruction line than CIO 010003.)
Execution
condition
Error-processing
block (optional)
Logic diagnosis block
Logic diagnosis execution condition
Diagnostic output
The diagnostic output (CIO 020000)
remains OFF because these input
conditions are OFF.
T
R
&100
FAL number = 10
Diagnostic output mode = 0 (bit address output)
Bit Address Found Flag
1: Bit address found
Input type
0: Normally open
Not used.
Contains internal I/O memory address.
R:
Not used.