Mitsubishi QJ71GP21-SX, Справочное руководство

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9
- 72 9.8 J(P)/G(P).REQ (Reading/Writing Clock Data)
9
DEDICATED INSTRUCTIONS
(c) Checking the execution status of the REQ instruction
The execution status of the REQ instruction (Executing, Normal completion, Error
completion) can be checked with the following devices specified in the setting
data.
1) Completion device (D2)
Turns ON in the END processing for the scan after completion of the REQ
instruction, and turns OFF in the next END processing.
2) Completion status indication device ((D2)+1)
Turns ON or OFF depending on the completion status of the REQ instruction.
• When completed normally
It remains OFF.
• When failed
It turns ON in the END processing for the scan after completion of the
REQ instruction, and turns OFF in the next END processing.
(d) Operation in REQ instruction execution
Figure 9.59 Operation in REQ instruction execution (own station)
Program of own station
Completion device of
own station (D2)
Completion status indication
device ((D2)+1)
REQ instruction
REQ instruction execution REQ instruction execution
completed
Start contact
OFF
OFF
OFF
ON
ON
ON
END processing END processing END processing END processing
When failed
Normal
completion
1 scan