Mitsubishi Electric GOT2000 Series Connection Manual page 92


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
Request message
(host GOT)
Response message
during normal
communication
(GOT host)
(format 1: GOT-A900 Series microcomputer connection (format 1))
Response message
during faulty
(format 2: GOT-A900 Series microcomputer connection (format 2))
communication
(GOT host)
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2. MICROCOMPUTER CONNECTION (SERIAL)
2.5 Message Formats
, D101=0304 are stored.)
H H
Message format
STX Command Address
R D 0 1
02 52 44 30 31 30
H H H H H
(H) (L) (H)
Sum check is performed in this range.
STX Data 1 (D100)
0 1 0 2
02 30 31 30 32
H H H H H
(H) (L) (H)
Sum check is performed in this range.
Error
NAK
code
15 06
H
The above is a case
where the sum check error
(06 ) has occurred.
H
D100 0102
H
D101 0304
H
Number of
ETX
points
0 0 0 2 B
30 30 32 03 42
H H H H H
(L) (H) (L) (H)
Data 2 (D101) ETX
0 3 0 4 8
30 33 30 34 03 38
H H H H H
(L) (H)
NAK
15
H
H
Sum
Check
C
43
H H
(L)
Sum
Check
D
44
H H
(L)