TOHO ELECTRONICS TTM-00BT User Manual
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7.9.6 Composition of a response message (transmitted from this product to a
high-level computer)
n For codes ① to ⑪, see "7.9.9 Code description."
n For specific examples of request messages, see "7.9.11 Examples of communications to be
read" and "7.9.12 Examples of communications to be written."
1) Response message in response to a read request message
S
T
X
□ □
A
C
K
□ □ □ □ □ □ □ □
E
T
X
B
C
C
① ② ③ ⑨
―⑤―
―――⑥―――
⑦ ⑧
Start code
Unit number
Channel
Acknowledge code
Identifier
Numerical data
End code
BCC data
2) Response message in response to a write/store request message
S
T
X
□ □
A
C
K
E
T
X
B
C
C
① ② ③ ⑨ ⑦ ⑧
Start code
Unit number
Channel
Acknowledge code
End code
BCC data
3) Response message in the case of an error
S
T
X
□ □
N
A
K
□
E
T
X
B
C
C
① ② ③ ⑩ ⑪ ⑦ ⑧
Start code
Unit number
Channel
Error code
ERR type
End code
BCC data