Mitsubishi Electric GOT1000 Series Connection Manual page 106

(b) When writing to a bit device
The following shows an example of writing "1"s to virtual devices M0 and M31.
Item
STX
02
H
Request message
(host GOT)
Response message
during normal
communication
(GOT host)
(format 1: GOT-A900 Series microcomputer connection (format 1))
Response message
(format 2: GOT-A900 Series microcomputer connection (format 2))
during faulty
communication
(GOT host)
2 - 34
2. MICROCOMPUTER CONNECTION (SERIAL)
2.5 Message Formats
M15 to 0 0000
M31 to 16 0000
Before execution
Command Address
W D 8 3 2 0
57 44 38 33 32 30
H H H H H
(H) (L) (H) – – (L)
H
H
Message format
Sum check is performed in this range.
Number
Data 1 (M15 to 0)
of points
0 2 0 0 0
30 32 30 30 30
H H H H H H
(H) (L) (H) – –
0 0 0 0 0 0 0 0 0 0 0 0
M M M M M M M M M M M M
1 1 1 1 1 1 9 8 7 6 5 4
5 4 3 2 1 0
ACK
06
H
NAK
15
H
Error
NAK
code
15 06
H H
The above is a case where
the sum check error (06 )
H
has occurred.
M15 to 0 0001
H
M31 to 16 8000
H
After execution
Data 2 (M31 to 16)
1 8 0 0 0
31 38 30 30 30
H H H H H
(L) (H) – – (L)
0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
M M M M M M M M M M M M M M M M M M M
3 2 1 0 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1
1 0 9 8 7 6 5 4 3 2 1 0 9 8 7
Sum
ETX
Check
5 6
03 35 36
H H H
(H) (L)
0
M
1
6