HRX-OM-S010
Chapter 4 MODBUS communication function
HRS100/150 Series
4.5
Message configuration
4-9
The communication example is expressed in hexadecimal value with
[ ]. The actual communication is performed in ASCII code. Refer to the
request / response message in this section.
4.5.2
Message example
The example shows communication with the conditions below.
○Slave Address
：
No.1
○Read seven consecutive data from register 0000h
.
(Read circulating fluid discharge temperature.)
Communication example
Request message
Response message
Code
Contents
Code
Contents
01
Slave Address
01
Slave Address
03
Function
03
Function
0000
Head address of specified register
02
Quantity of bytes to read
0001
Quantity of register to read
00EE
Information of 0000h (circulating fluid
discharge temperature: 23.8
o
C)
FB
LRC
0C
LRC
Request message (Master to Slave)
Start
Slave Address
Function
Data
LRC
End
3A
30
31
30
33
46
42
0D
0A
Read Address
Quantity to Read
Hi
Lo
Hi
Lo
30
30
30
30
30
30
30
31
Response message (Slave to Master)
Start
Slave Address
Function
Data
LRC
End
3A
30
31
30
33
30
43
0D
0A
Byte Count
Read Data1
Hi
Lo
30
32
30
30
45
45
This product
(Request): 010300000001FB [CR][LF]
(Response): 01030200EE0C [CR][LF]
Your system
Data is sent and
received in ASCII
code.
