Mitsubishi Electric GOT2000 Series Connection Manual page 108

(b) When reading a bit device
The following shows an example of reading the two points of the virtual devices M0 to M31.
(Assuming M0="1" and M31="1" are stored.
Item
Request
message
(host GOT)
Response
message during
normal
communication
(GOT host)
Response
message during
faulty
communication
(GOT host)
2 - 38
2.5 Message Formats
STX Command
R
02 52
H
(H)
STX
0
02 30
H
(H)
0 0 0 0
M M M M
1 1 1 1
5 4 3 2
(format 1: GOT-A900 Series microcomputer connection (format 1))
(format 2: GOT-A900 Series microcomputer connection (format 2))
M15 to 0 0001
M31 to 6 8000
Message format
Address
D 8 3 2 0
44 38 33 32 30
H H H H H
(L) (H) (L)
Sum check is performed in this range.
Sum check is performed in this range.
Data 1 (M15 to 0) Data 2 (M31 to 16)
0 0 1 8 0
30 30 31 38 30
H H H H H
(L) (H)
0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0
M M M M M M M M M M M M M M M M M M
1 1 9 8 7 6 5 4 3 2 1 0 3 3 2 2 2 2
1 0 1 0 9 8 7 6
NAK
15
H
Error
NAK
code
15 06
H H
The above is a case where
the sum check error (06
has occurred.
H
H
Sum
Number of
ETX
points Check
0 2 C 8
30 32 03 43 38
H H H H H H
(H) (L) (H) (L)
Sum
ETX
Check
0 0 8 C
30 30 03 38 43
H H H H H
(L) (H) (L)
0 0 0 0 0 0 0 0 0 0
M M M M M M M M M M
2 2 2 2 2 2 1 1 1 1
5 4 3 2 1 0 9 8 7 6
)
H
H