JXCT 485 - Page 15

Interrogation
frame
Address code
Features
Register
start
address
Regist
er
length
Check
code low
High bit
of proof
code
1 byte 1 byte 2 byte 2 byte 1 byte 1
Reply frame
address Features
Code
Code
Valid
byte
number
First
number
According
to the
distrit
Second
number
According to
the district
1 byte 1 byte 2 byte 2 byte 2 byte
4.2 Register address
4.1
通
讯
协
议
4.2
4.3 Examples and explanations
Read the total solar radiation
value of the device address
0x01Interrogation frame
Register
PLC groupv content
content 操作
address
0000H
40001
Total solar radiation
(1W/m2)
Read
only
0100H
40101
Device address (0-252)
Read
and
write
0101H
40102
Baud rate (2400/4800/9600)
Read
and
write
addre
ss
code
funct
ion
code
initial
address
Data
length
Check
code low
bit
Check code
high