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Toho-electronics TRM-006A Manual de usuario Pagina 22

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6.3.3 Composition of a store request message
a)
Slave address 03H
b)
Function code 10H
High level
02H
c)
Register address
Low level
0EH
First register address
High level
00H
d)
Number of registers
Low level
02H
Fixed at 2
f)
Number of data items 04H Number of registers × 2
High level
00H
Data for the first register
(a low-level word)
Low level
00H
High level
00H
g)
Data for the first register + 1
(a high-level word)
Low level
00H
The data about the storage of settings
is arbitrary.
High level
60H
e)
CRC-16
Low level
FBH
6.4 Composition of an RTU response message (transmitted from this product
to a high-level computer)
n For codes a) through h), see "6.5 Description of RTU codes."
6.4.1 Response message for a read request message
a)
Slave address 1BH
b)
Function code 03H
d)
Number of data items 04H Number of registers × 2
High level
03H ③
Data for the first register
(a low-level word)
Low level
09H ④
High level
00H ①
g)
Data for the first register + 1
(a high-level word)
Low level
00H 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.)
High level
91H
e)
CRC-16
Low level
B4H
6.4.2 Response message for a write/store request message
a)
Slave address 03H
b)
Function code 10H
High level
00H
c)
Register address
Low level
00H
First register address
High level
00H
d)
Number of registers
Low level
02H
Fixed at 2
High level
40H
e)
CRC-16
Low level
2AH
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