Mitsubishi MELSEC LJ71C24, User Manual

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12 - 10 12 - 10
12 DEDICATED INSTRUCTIONS
(4) Whether a CPRTCL instruction was completed normally or abnormally can be
checked by the completion device ((D)) or status display device at completion
((D)+1).
(a) Completion device: Turns ON at the END processing of the scan where the
CPRTCL instruction is completed, and turns OFF at the
next END processing.
(b) Status display device
at completion : Turns ON and off depending on the completion status of
the CPRTCL instruction.
y Normal completion : OFF with no change.
y Error completion : Turns ON at the END
processing of the scan where
the CPRTCL instruction is
completed, and turns OFF at
the next END processing.
Sequence program
CPRTCL instruction
Completion device
Status display device
at completion
Execution of
CPRTCL instruction
Completion of
sending by
CPRTCL instruction
ON
ON
Error
completion
Normal
completion
One scan
OFF
END END END END
[Operation during execution of the CPRTCL instruction]
OFF
POINT
The following describes how to check the execution status of protocols.
(1) Checking with the buffer memory
Use the protocol execution status (address: 4041
H
/4051
H
).
For details, refer to Appendix 1.
(2) Checking with GX Works2
Open the "Predefined Protocol Function" tab in the "State Monitor" screen.
For details, refer to Section 13.2.