Mitsubishi Electric Melsec Q Series User Manual page 230

6 DEDICATED INSTRUCTIONS
[Operation of the local station when the WRITE instruction is being executed]
Sequence program
WRITE instruction
Send/receive
direction flag
Completion device
Status display device
at completion
Errors
Program example
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(b) Status display device at completion ((D2) + 1)
Turns on and off depending on the completion status of the WRITE
instruction.
Normal completion : Stays off and does not change.
Abnormal completion: Turns on at the END processing of the scan where
END END
processing processing
ON
OFF
ON
OFF
OFF
OFF
(5) When the instruction is executed using J.WRITE/G.WRITE, the next write
processing is executed in succession after one write processing is completed
while the write command is on.
When the instruction is executed using JP.WRITE/GP.WRITE, the write
processing is executed only once when the write command switches from off to on
(at rise).
(1) When a dedicated instruction ends with an error, the abnormal completion signal
(D2) + 1 turns on and the error code is stored in the completion status (S1) + 1.
See the following manuals regarding the error code, check the errors and take
corrective actions.
<Error codes>
4FFF or less : User's Manual (Hardware Design, Maintenance and Inspection)
H
C000 or higher: User's Manual (Basic)
H
See the program example of the SWRITE instruction described in Section 6.11.
The SWRITE instruction only differs from the WRITE instruction on one point,
namely that the write notification device (D3) is not designated at the end of
arguments.
the WRITE instruction is completed, and turns off at
the next END processing.
WRITE instruction
execution is completed
for the CPU module used
MELSEC-Q/L
END END
processing processing
ON
Abnormal
ON
completion
Normal
completion
One scan
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