TOHO ELECTRONICS TTM000 - Manual (Page 15)

15
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
２ ７ Ｒ
Ｂ
Ｃ
Ｃ
Ｐ Ｖ １
Ｅ
Ｔ
Ｘ
① ② ③ ｜ ④ ｜ ⑥ ⑦
Ｓ
Ｔ
Ｘ
２ ７
Ａ
Ｃ
Ｋ
Ｂ
Ｃ
Ｃ
Ｐ Ｖ １
Ｅ
Ｔ
Ｘ
① ② ⑧ ｜ ④ ｜ ⑥ ⑦
０ ０ ７ ７ ７
｜ ｜ ⑤ ｜ ｜
Code Code, data ASCII code, note 2)
① Start code STX 02H
② Address 27 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 "9. Table of identifiers (codes)."
Note 2): For the ASCII codes, see "10. Table of ASCII codes."