TOHO ELECTRONICS TTM000 - Manual (Page 10)

10
3.4 Composition of a response message
(transmitted from this product to a high-level computer)
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."
3.4.1 Response message in response to a read request message
Ｓ
Ｔ
Ｘ
□ □
Ａ
Ｃ
Ｋ
Ｂ
Ｃ
Ｃ
□ □ □
Ｅ
Ｔ
Ｘ
①
S
ta
rt
co
de
②
A
dd
re
ss
⑧
A
ck
no
w
le
dg
e c
od
e
｜ ④
Id
en
tifi
er
｜ ⑥
E
nd
c
od
e
⑦
B
C
C
d
at
a
□ □ □ □ □
｜ ｜ ⑤
N
um
er
ic
al
da
ta
｜ ｜
3.4.2 Response message in response to a write/store request message
Ｓ
Ｔ
Ｘ
□ □
Ａ
Ｃ
Ｋ
Ｂ
Ｃ
Ｃ
Ｅ
Ｔ
Ｘ
①
S
ta
rt
co
de
②
A
dd
re
ss
⑥
E
nd
c
od
e
⑦
B
C
C
d
at
a
⑧
A
ck
no
w
le
dg
e c
od
e
3.4.3 Response message in the case of an error
Ｓ
Ｔ
Ｘ
□ □
Ｎ
Ａ
Ｋ
Ｂ
Ｃ
Ｃ
Ｅ
Ｔ
Ｘ
①
S
ta
rt
co
de
②
A
dd
re
ss
⑥
E
nd
c
od
e
⑦
B
C
C
d
at
a
⑨
N
eg
ati
ve
□
⑩
E
rro
r c
od
e
ac
kn
ow
le
dg
e c
od
e