Toho-electronics TTM200 Manual de usuario descargar pdf (Pagina 13)

4. Examples of TOHO communications

4.1 Examples of communications to be read

Example: Request message: This requests this product set at address 27 to read the PV.

(High-level computer)

In response to that,

Response message: This returns PV data (00777).

(This product)

Read request message (transmitted from the high-level computer)

Ｓ

Ｔ

Ｘ

２７Ｒ

Ｂ

Ｃ

ＰＶ１

Ｅ

Ｔ

Ｘ

① ② ③ ｜④｜ ⑥ ⑦

Ｓ

Ｔ

Ｘ

２７

Ａ

Ｃ

Ｋ

Ｂ

Ｃ

ＰＶ１

Ｅ

Ｔ

Ｘ

① ② ⑧ ｜④｜

⑥ ⑦

００７７７

｜｜⑤｜｜

Code

Code, data

ASCII code, note 2)

① Start code

STX

02H

② Address

32H 37H

③ Request contents

R (Read)

52H

④ Identifier, note 1)

PV1

50H 56H 31H

⑤ Numerical data

00777

30H 30H 37H 37H 37H

⑥ End code

ETX

03H

⑦ BCC data request

61H

response

02H

⑧ Acknowledge code

ACK

06H

Note 1): See "10. Table of identifiers (codes)."

Note 2): For the ASCII codes, see "11. Table of ASCII codes."

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Toho-electronics TTM200 Manual de usuario Pagina 13

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