HRX-OM-W004
Chapter 3 Serial communication
3.13
Register Map HRR Series
3-22
3.13.12 Data instruction
Selected data is displayed in the address 0009h (Data display 1) and
0010h (Data display 2) by setting the Data instruction.
Data types which can be displayed are shown below. Data display 1
shows the data instructed by the Data instruction 1 (instructed by low
order 8 bits).
Data display 2 shows the data instructed by the Data instruction 2
(instructed by high order 8 bits).
MSB LSB
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Data instruction 2 Data instruction 1
Bit 7 to 0：Data instruction 1
0：
None
1：TH1(circulating fluid return temp)
Bit 15 to 8：
Data instruction 2
0：
None
1：TH1(circulating fluid return temp)
Example)
Display the circulating fluid return temperature
When 0001h is entered to the address 000F, the circulating fluid return
temperature is displayed in 0009h.
■
Communication example
○When reading the circulating fluid return temp to the data display 1
○Slave Address：No.1
○Function code 23: One data of 0009h is read and one data is written to 000Fh
(Set circulating fluid return temperature to data instruction 1. Read circulating fluid
return temp of data display 1.)
Request message 011700090001000F0001020001
Field name
Example
(HEX)
ASCII mode
character data
RTU mode
binary data
Header
- “:” None
Slave Address
0x01 “0”,“1” 0x01
Function
0x17 “1”,“7” 0x17
Head address of specified register
0x0009 “0”,“0”,“0”“9” 0x00,0x09
Head address of specified register
0x0001 “0”,“0”,“0”“1” 0x00,0x01
Head address of specified register
0x000F “0”,“0”,“0”,“F” 0x00,0x0F
Quantity of register to write
0x0001 “0”,“0”,“0”,“1” 0x00,0x01
Quantity of byte to read
0x02 “0”,“2” 0x02
Information written to 000Fh
(Data instruction)
0x0001 “0”,“0”,“0”,“1” 0x00,0x01
Checksum ASCII:LRC RTU:CRC
- “C”,”B” 0x45,0xBE
Trailer
- CR/LF None
- Total
quantity of byte
31 15
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