Toho-electronics TTM-00BT Uživatelský manuál stáhnout pdf (Strana 20)

7.9.5 Composition of a request message (transmitted from a high-level computer to

this product)

n For codes ① to ⑧, 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) Composition of a read request message

□

①

②

③

④

―⑤― ⑦

⑧

Start code

Unit number

Channel

Contents of the

request: read

Identifier

End code

BCC data

2) Composition of a write request message

□

①

②

③

④

―⑤― ―――⑥――― ⑦

⑧

Start code

Unit number

Channel

Contents of the

request: write

Identifier

Numerical data

End code

BCC data

3) Composition of a store request message

□

①

②

③

④

―⑤― ⑦

⑧

Start code

Unit number

Channel

Contents of the

request: write

Identifier

End code

BCC data

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 34 35

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