Toho-electronics TTM200 Manual do Utilizador descarregar pdf (Página 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

□ □ □

Ｅ

Ｔ

Ｘ

①

Start code

②

Address

③

Contents of the

｜④

Identifier

｜ ⑥

End code

⑦

BCC data

request: read/write

3.3.2 Composition of a write request message

Ｓ

Ｔ

Ｘ

□ □

Ｗ

Ｂ

Ｃ

□ □ □

Ｅ

Ｔ

Ｘ

①

Start code

②

Address

③

Contents of the

｜④

Identifier

｜

⑥

End code

⑦

BCC data

□ □ □ □ □

｜｜⑤

Numerical data

｜｜

request: read/write

3.3.3 Composition of a store request message

Ｓ

Ｔ

Ｘ

□ □

Ｗ

Ｂ

Ｃ

ＳＴＲ

Ｅ

Ｔ

Ｘ

①

Start code

②

Address

③

Contents of the

｜④

Identifier

｜ ⑥

End code

⑦

BCC data

request: read/write

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