Toho-electronics TTM000 Manual de usuario descargar pdf (Pagina 27)

6.8 Composition of an ASCII request message

(transmitted from a high-level computer to this product)

For the codes a) through g), see "6.10 Description of ASCII codes."

6.8.1 Composition of a read request message

Start code

“:”

Slave address

“1” , “B”

Function code

“0” , “3”

High level

“0” , “0”

First register address

Low level

“0” , “0”

Number of registers

High level

“0” ,

“0”

Fixed at 2

Low level

“0” , “2”

LRC

“E” , “0”

End code

CR, LF

6.8.2 Composition of a write request message

Start code

“:”

Slave address

“0” , “3”

Function code

“1” , “0”

High level

“0” , “0”

First register address

Low level

“C” , “0”

Number of registers

High level

“0” , “0”

Fixed at 2

Low level

“0” , “2”

Number of data items

“0” , “4”

Number of registers

Data for the first register

(a low-level word)

High level

“0” , “0”

③

When writing

①

②

③

, and

④

H in the data, write them in the

order described on the left-hand

side. (① represents 1 byte.)

Low level

“6” , “F”

④

Data for the first register + 1

(a high-level word)

High level

“0” , “0”

①

Low level

“0” , “0”

②

LRC

“E” , “0”

End code

CR, LF

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 41 42

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Toho-electronics TTM000 Manual de usuario Pagina 27

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