TOHO ELECTRONICS TTM200 - Manual (Page 8)

8
3.3 Composition of a request message (transmitted from a high-level
computer to this product)
 For codes ① to ⑩, see "3.5 Description of codes."
 For specific examples of request messages, see "4.1 Examples of communications to be read"
and "4.2 Examples of communications to be written."
3.3.1 Composition of a read request message
Ｓ
Ｔ
Ｘ
□ □ Ｒ
Ｂ
Ｃ
Ｃ
□ □ □
Ｅ
Ｔ
Ｘ
①
S
ta
rt
c
o
d
e
②
A
d
d
re
s
s
③
C
o
n
te
n
ts
o
f t
h
e
｜ ④
Id
e
n
tif
ie
r
｜ ⑥
E
n
d
c
o
d
e
⑦
B
C
C
d
a
ta
re
q
u
e
s
t:
re
a
d
/w
rit
e
3.3.2 Composition of a write request message
Ｓ
Ｔ
Ｘ
□ □ Ｗ
Ｂ
Ｃ
Ｃ
□ □ □
Ｅ
Ｔ
Ｘ
①
S
ta
rt
c
o
d
e
②
A
d
d
re
s
s
③
C
o
n
te
n
ts
o
f t
h
e
｜ ④
Id
e
n
tif
ie
r
｜ ⑥
E
n
d
c
o
d
e
⑦
B
C
C
d
a
ta
□ □ □ □ □
｜ ｜ ⑤
N
u
m
e
ric
a
l d
a
ta
｜ ｜
re
q
u
e
s
t:
re
a
d
/w
rit
e
3.3.3 Composition of a store request message
Ｓ
Ｔ
Ｘ
□ □ Ｗ
Ｂ
Ｃ
Ｃ
Ｓ Ｔ Ｒ
Ｅ
Ｔ
Ｘ
①
S
ta
rt
c
o
d
e
②
A
d
d
re
s
s
③
C
o
n
te
n
ts
o
f t
h
e
｜ ④
Id
e
n
tif
ie
r
｜ ⑥
E
n
d
c
o
d
e
⑦
B
C
C
d
a
ta
re
q
u
e
s
t:
re
a
d
/w
rit
e