Mitsubishi Electric GOT2000 Series Connection Manual page 103

(3) Random read in word units (RR) command
The following shows an example of reading the two points of the virtual devices D100 and M0 to M15.
(Assuming D100=0064H, M0=1are stored.)
Item
Request message
(host GOT)
Response
message during
normal
communication
(GOT host)
(format 1: GOT-A900 Series microcomputer connection (format 1))
Response
message during
(format 2: GOT-A900 Series microcomputer connection (format 2))
faulty
communication
(GOT host)
D100
M15 to 0
Message format
STX Command Address 1
R R 0 1 0
02 52 52 30 31 30
H H H H H H
(H) (L) (H) – –
Sum check is performed in this range.
Sum check is performed in this range.
STX Data 1 (D100)
0 0 6 4
02 30 30 36 34
H H H H H
(H) – – (L)
NAK
15
H
The above is a case where
the sum check error (06
has occurred.
0064
H
0001
H
Address 2 ETX
0 8 3 2 0
30 38 33 32 30 03
H H H H H
(L) (H) – – (L)
Data 2 (M15 to 0) ETX
Check
0 0 0 1 8
30 30 30 31 03 38
H H H H H
(H) – – (L) (H)
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1
M M M M M M M M M M M M M M M M
1 1 1 1 1 1 9 8 7 6 5 4 3 2 1 0
5 4 3 2 1 0
NAK
15
H
Error
code
06
H
)
H
2.5 Message Formats
Sum
Check
3 5
33 35
H H H
(H) (L)
Sum
E
45
H H
(L)
2 - 41
2