Mitsubishi MELSEC-F User Manual page 163
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9 WHEN COMMUNICATING DATA USING THE MC PROTOCOL
External device side
(Data name)
(Example)
O
30
30
H
PLC side
External device side (Response message)
(Normal completion)
9 - 4
(2) Control procedure
The following diagrams illustrate the control procedure for communicating with
the MC protocol and the order of data items in the application data field.
The header section shown in the message explanation diagram of this section
corresponds to the
Section 9.3.2 and later.
See Section 9.1.3 regarding the content of data items in the message format and
data specification method.
(a)
Communication in ASCII code
1)
When reading data from the local station PLC at the external device
side
PLC side (Command message)
Text (Command)
L
H
H
-
-
L
O
F
F
O
O
A
O
46
46
30
30
30
41
H
H
H
H
H
H
H
Text (Response)
H
L
8
0
0
0
38
30
30
30
H
H
H
H
Character area B
portion of the message explanation diagrams indicated in
Character area A
(Abnormal completion)
When complete code
5BH is returned
Exists only when the complete code is "5B."
MELSEC-F
The contents and arrangement of the data items in
the text differs according to the function to use.
See the sections explaining functions found in
Section 9.3.2 and after for details
Text (Response)
H
L
H
L
8
0
5
B
1
2
38
30
35
42
31
32
H
H
H
H
H
0
0
30
30
H
H
H
9 - 4
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