Mitsubishi QJ71C24N User Manual page 295

10 DEDICATED INSTRUCTIONS
Error
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(4) Whether an INPUT instruction was completed normally or abnormally can be
checked by the completion device ((D2)) or status display device at completion
((D2)+1).
(a) Completion device: Turns on at the END processing of the scan where the
(b) Status display device
at completion
[Operation during execution of an INPUT instruction]
Sequence
program
Reception data
read request (X3)
Reception abnormal
detection (X4)
Completion device
Status display device
at completion
(1) When a dedicated instruction is completed abnormally, the abnormal completion
signal (D2)+1, turns on and the error code is stored in the reception result (S)+1.
In case of operation errors, the error flag (SM0) turns on and the error code is
stored in SD0.
See one of the following manuals according to the error code, and check and
correct the error.
<Error code>
4FFF or less : QCPU User's Manual
H
(Hardware Design, Maintenance and Inspection)
7000 or more: Section 11.2
H
INPUT instruction is completed, and turns off at the next
END processing.
: Turns on and off depending on the completion status
of the INPUT instruction.
• Normal completion : Off with no change.
• Abnormal completion: Turns on at the END
END END
processing
processing
OFF
OFF
INPUT
instruction
MELSEC-Q
processing of the scan where
the INPUT instruction is
completed, and turns off at
the next END processing.
END END
processing processing
ON
Abnormal
completion
ON
Normal
completion
One scan
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