Toho-electronics TTM000 Manual de usuario descargar pdf (Pagina 29)

6.9 Composition of ASCII response messages

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

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

6.9.1 Response message for a read request message

Start code

“:”

Slave address

“1” , “B”

Function code

“0” , “3”

Number of data items

“0”

, “4”

Number of registers

Data for the first register

(a low-level word)

High level

“0” , “3”

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

“0” , “9”

④

Data for the first register + 1

(a high-level word)

High level

“0” , “0”

①

Low level

“0” , “0”

②

LRC

“D” , “2”

End code

CR, LF

6.9.2 Response message for a write/store request message

Start code

“:”

Slave address

“0” , “3”

)

Function code

“1” , “0”

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” , “B”

End code

CR, LF

6.9.3 Response message in the case of an error

Start code

“:”

Slave address

“1” , “B”

Function code

“8” , “3”

In the case of an error, the function

code for the request message + 80H is

entered.

Error code

“0” , “2”

LRC

“6” , “0”

End code

CR,

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 41 42

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Toho-electronics TTM000 Manual de usuario Pagina 29

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