Mitsubishi Electric FX3U-ENET-ADP User Manual page 58

FX -ENET-ADP User's Manual
3U
When communicating using the MC protocol, the user does not need to specify a response for a
command from an external device; the Ethernet adapter generates it and then responds.
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
portion of the message explanation diagrams indicated in Subsection 7.5.2 and later.
Refer to Subsection 7.3.3 regarding the content of data items in the message format and data
specification method.
a) Communication in ASCII code
- When reading data from the local station PLC at the external device side
External device side PLC side (Command message)
(Data name)
H L H
(Example)
0 0 F
46
30 30
H H H
PLC side External device side (Response message)
(Normal completion)
8
38 30
H
- When writing data to the local station PLC from the external device side
External device side
(Data name)
H
(Example)
0 2 F F
30 32 46
H H
PLC side External device side (Response message)
(Normal completion)
8
38
H
52
Text (Command)
- - L
F 0 0 0 A
46 30 30 30 41
H H H H H
Character area A
Text (Response)
H L
0 0 0
30 30
H H H
Character area B
PLC side (Command message)
Text (Command)
- -
L H L
0 0 A
0
46 30 30 30 41
H H H H H H
Character area C
Text (Response)
H L
2 0 0
32 30 30
H H H
7.3 Message Formats and Control Procedures
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 7.5.2 and after for details.
(Abnormal completion)
When complete code
5B is returned
H
Exists only when the complete code is "5B."
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 7.5.2 and after for details.
(Abnormal completion)
When complete code
5B is returned
H
Exists only when the complete code is "5B."
7 Communication Using MC Protocol
Text (Response)
H L H L
8 0 5 B 1 2 0 0
31 32
38 30 35 42 30 30
H
H H H H H H H
Text (Response)
L H L
H
8 2 1 2 0
5 B 0
38 32 35 42 31 32 30 30
H H H H H H H
H