TOHO ELECTRONICS TTM-10L - Manual (Page 8)

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3.4 Composition of a response message (transmitted from this product to a
high-level computer)
n For codes ① to ⑩, see "3.5 Description of codes."
n 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
□
Ｂ
Ｃ
Ｃ
□
Ｅ
Ｔ
Ｘ
①
Start code
⑧
Acknowledge code
｜ ④
Identifier
｜ ⑥
End code
⑦
BCC data
□ □ □
⑤
Numerical data
Ａ
Ｃ
Ｋ
②
Address
□ □
3.4.2 Response message in response to a write/store request message
□
Ｓ
Ｔ
Ｘ
□
Ｂ
Ｃ
Ｃ
Ｅ
Ｔ
Ｘ
①
Start code
⑥
End code
⑦
BCC data
⑧
Acknowledge code
②
Address
Ａ
Ｃ
Ｋ
3.4.3 Response message in the case of an error
□
Ｓ
Ｔ
Ｘ
□
Ｂ
Ｃ
Ｃ
①
Start code
⑥
End code
⑦
BCC data
⑨
Negative
□
⑩
Error type acknowledge code
②
Address
Ｎ
Ａ
Ｋ
Ｅ
Ｔ
Ｘ