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Mitsubishi MELSEC Q Series Reference Manual page 124

With melsec communication protocol
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External
device side
Programmable controller CPU side
External
device side
Programmable controller CPU side
3 - 64
3 WHEN COMMUNICATING USING THE QnA COMPATIBLE 3E/3C/4C FRAMES OR 4E FRAME
(a) Data in the character areas when communicating in ASCII code
The data order and contents of character areas A, B, and C are identical
when the same command is used under the same conditions in the control
procedure when communicating using ASCII code.
(Example)
Reading data
Character area A
H
– –
L
H – – – – L
H
Character area C
H
L
H – – – – L
H
– –
The data arrangement and content of the area marked with " " are
shown in Section 3.1.
Character area B
– –
L
L
– –
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