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Toho-electronics TRM-006A Manual de usuario Pagina 27

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6.8 Composition of an ASCII request message (transmitted from a high-level
computer to this product)
n For the codes a) through g), see "6.10 Description of ASCII codes."
6.8.1 Composition of a read request message
a)
Start code “:”
b)
Slave address “1” , “B”
c)
Function code “0” , “3”
High level
“0” , “0”
d)
Register address
Low level
“0” , “0”
First register address
High level
“0” , “0”
e)
Number of registers
Low level
“0” , “2”
Fixed at 2
f)
LRC “E” , “0”
g)
End code CR, LF
6.8.2 Composition of a write request message
a)
Start code “:”
b)
Slave address “0” , “3”
c)
Function code “1” , “0”
High level
“0” , “0”
d)
Register address
Low level
“C” , “0”
First register address
High level
“0” , “0”
e)
Number of registers
Low level
“0” , “2”
Fixed at 2
h)
Number of data items “0” , “4” Number of registers × 2
High level
“0” , “0” ③
Data for the first register
(a low-level word)
Low level
“6” , “F” ④
High level
“0” , “0” ①
i)
Data for the first register + 1
(a high-level word)
Low level
“0” , “0” ②
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.)
f)
LRC “E” , “0”
g)
End code CR, LF
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