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Mitsubishi Electric GOT1000 Series Connection Manual Page 177

Microcomputers, modbus products, peripherals.
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Message Formats
(1) Batch read in word units (RD) command
(a) When reading a word device
The following shows an example of reading the two points of the virtual devices D100 and D101.
(Assuming D100=0102
Item
(format 1: GOT-A900 Series microcomputer connection (ASCII))
Request message
(host
GOT)
(format 2: GOT-A900 Series microcomputer connection (Binary))
(format 1: GOT-A900 Series microcomputer connection (ASCII))
Response message
during normal
communication
(format 2: GOT-A900 Series microcomputer connection (Binary))
(GOT
host)
Response message
during faulty
communication
(GOT
host)
, D101=0304
are stored.)
H
H
D100
D101
Message format
Command
Address
R
D
0
1
52
44
30
31
H
H
H
H
(H)
(L)
(H)
Command
R
D
Data 1 (D100)
0
1
0
2
30
31
30
32
H
H
H
H
(H)
(L)
Data 1
(D100)
01
02
H
H
Error
NAK
code
15
06
H
H
The above is a case
where the sum check error
(06
) has occurred.
H
3. MICROCOMPUTER CONNECTION (ETHERNET)
0102
H
0304
H
Number of
points
0
0
0
2
30
30
30
32
H
H
H
H
(L)
(H)
(L)
Number
Address
of points
00
64
02
H
H
H
Data 2 (D101)
0
3
0
4
30
33
30
34
H
H
H
H
(H)
(L)
Data 2
(D101)
03
04
H
H
3.4 Message Formats
1
2
3
4
5
6
7
8
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