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9
WHEN COMMUNICATING DATA USING THE MC PROTOCOL
External device side
(Data name)
(Example)
0
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
Subsection 9.3.2 and later.
See Subsection 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
0
F
F
0
0
0
A
46
46
30
30
30
41
H
H
H
H
H
H
H
Character area A
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
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
Subsection 9.3.2 and after for details
(Abnormal completion)
When complete code
5B
is returned
H
Exists only when the complete code is "5B."
MELSEC-F
Text (Response)
H
L
H
L
8
0
5
B
1
2
0
0
38
30
35
42
31
32
30
30
H
H
H
H
H
H
H
H
9 - 4
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