SMC Networks HRR012-A*-20 Series Operation Manual

HRX-OM-W004
Chapter 3 Serial communication
3.11 Explanation of function codes HRR Series
3-12
No
Classification
Contents Result
1
CRC
message for
calculation
0106000B00FE -
2
Calculation
Perform (1) to (4) for the 1st value (0001h) and then,
perform (5).
807Eh
3
Perform (6) for 2nd value (0006h) and then, perform
(5).
2280h
4
Perform (6) for 3rd. value (0000h) and then, perform
(5).
A023h
5
Perform (6) for 4th value (000Bh) and then, perform
(5).
1EA0h
6
Perform (6) for 5th value (0000h) and then, perform
(5).
781Eh
7
Perform (6) for 6th value (00FEh) and then, perform
(5).
8879h
(CRC)
8
Addition to the
sent message
0106000B00FE7988∗１ -
∗１ When incorporating it into the message, set it in order of low byte and high byte.
3.11 Explanation of function codes
3.11.1 Function code：04 Reading multiple registers
Register data of assigned points from assigned address is read.
■
Communication example
○Slave Address : No.1
○
Read seven consecutive data from register 0000h.
(
Read circulating fluid discharge temperature、circulating fluid flow rate、circulating fluid
discharge pressure
、 electric conductivity of the circulating fluid 、 status address
information
、alarm information)
Request message 010400000007
Field name
Example
(HEX)
ASCII mode
character data
RTU mode
binary data
Header - “:”
None
Slave Address 0x01
“0”,“１” 0x01
Function 0x04 “0”,“4” 0x04
Head address of specified register 0x0000 “0”,“0”,“0”,“0” 0x00,0x00
Quantity of register to read 0x0007 “0”,“0”,“0”,“7” 0x00,0x07
Checksum ASCII:LRC RTU:CRC -
“F”,”4” 0xB1,0xC8
Trailer
-
CR/LF
None
Total
quantity of byte
17 8

SMC Networks HRR012-A*-20 Series Specifications

General

Brand	SMC Networks
Model	HRR012-A*-20 Series
Category	Chiller
Language	English