Mitsubishi Electric GT16, Руководство пользователя, Страница: 1158 / 1306

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61. MICROCOMPUTER CONNECTION (SERIAL)
61.5 Message Formats
(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=0064
H
, M0=1are stored.)
D100 0064
H
0001
H
M15 to 0
Item Message format
Request message
(host
GOT)
Response message
during normal
communication
(GOT
host)
Response message
during faulty
communication
(GOT
host)
(format 1: GOT-A900 Series microcomputer connection (format 1))
(format 2: GOT-A900 Series microcomputer connection (format 2))
Sum check is performed in this range.
02
H
STX
03
H
ETX
(H) (L)
3 5
33
H
35
H
Sum
Check
(H) (L)
Command
R R
52
H
52
H
(H) (L)
Address 1
0 1
30
H
31
H
– –
0
30
H
0
30
H
(H) (L)
Address 2
8 3
38
H
33
H
– –
2
32
H
0
30
H
Sum check is performed in this range.
02
H
STX
03
H
ETX
(H) (L)
8 E
38
H
45
H
Sum
Check
(H) (L)
Data 1 (D100)
0
30
H
– –
6
36
H
4
34
H
0
30
H
0 0 0 0 0 0 0 0
M
0
M
1
M
2
M
3
M
4
M
5
M
6
M
7
M
8
M
9
M
1
0
M
1
2
M
1
3
M
1
4
M
1
5
M
1
1
1 0 0 0 0 0 0 0
(H) (L)
Data 2 (M15 to 0)
0
30
H
– –
0
30
H
1
31
H
0
30
H
15
H
NAK
The above is a case where
the sum check error (06
H
)
has occurred.
15
H
NAK
06
H
Error
code