10 CPU Unit Functions
10-80
CJ2 CPU Unit Software User’s Manual
z Time Monitoring:
Monitors whether output C goes ON within 10 seconds after input A. If C doesn't go ON within 10
seconds, a failure is detected and the Carry Flag is turned ON. The Carry Flag executes the error-
processing block. Also, an FAL error (non-fatal error) with FAL number 004 is generated.
z Logic Diagnosis:
FPD(269) determines which input bit in block B is preventing output C from going ON. That bit
address is output to D1000.
z Auxiliary Area Flags and Words
Name Address Operation
Error Code A400 When an error occurs, its error code is stored in A400.
FAL Error Flag A402.15 ON when FAL(006) is executed.
FALS Error Flag A401.06 ON when FALS(007) is executed.
Executed FAL Number
Flags
A360 to
A391
The corresponding flag is turned ON when an FAL(006) or FALS(007)
error occurs.
Error Log Area A100 to
A199
The Error Log Area contains information on the most recent 20 errors.
Error Log Pointer A300 When an error occurs, the Error Log Pointer is incremented by 1 to indi-
cate where the next error record will be recorded as an offset from the
beginning of the Error Log Area (A100).
Error Log Pointer Reset
Bit
A500.14 Turn this bit ON to reset the Error Log Pointer (A300) to 00.
FPD Teaching Bit A598.00 Turn this bit ON when you want the monitoring time to be set automati-
cally when FPD(269) is executed.
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