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4. Example of TOHO Communication
4.1 Sample Communication for Reading
Example:
Request Message: Request this product, which address is set as "27," to read the measured value
(P().
(Upper computer)
For the above request,
Response Message: Returns the data (00777) of the measured value (P().
(This product)
Read Request Message (to be sent by the upper 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
Symbol・Data
ASCII Code Note 2)
① Start Code
STX
02H
② Address
27
32H 37H
③ Contents of Request
R (Read)
52H
④ Identifier Note 1
P(1
50H 56H 31H
⑤ Numerical Data
00777
30H 30H 37H 37H 37H
⑥ End Code
ETX
03H
⑦ BCC Data Request
Re-
sponse
61H
02H
⑧ Acknowledgment Code
ACK
06H
Note 1: See "9. List of Identifiers (Codes)."
Note 2: See "10. List of ASCII Codes" for the details about ASCII codes.
