SMC Networks HECR Series Communications Manual

MODBUS communication function
HECR 5-10
5.8.3 Function code：10H Writing multiple registers
Register content of assigned points of assigned address is written.
◼ Request message <Normal> (Master to Slave)
Start
Slave Address
Function
Data
LRC
End
[:]
XX
XX
[1]
[0]
XX
XX
[CR]
[LF]
Write Address
Quantity to Write
Hi
Lo
Hi
Lo
XX
XX
XX
XX
XX
XX
XX
XX
Byte Count
Write Data1
Write Data n
Hi
Lo
Hi
Lo
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
◼ Response message <Normal> (Slave to Master)
Start
Slave Address
Function
Data
LRC
End
[:]
XX
XX
[1]
[0]
XX
XX
[CR]
[LF]
Write Address
Quantity to Write
Hi
Lo
Hi
Lo
XX
XX
XX
XX
XX
XX
XX
XX
◼ Communication example
1) Slave Address (=Unit number): No 1
2) Write two consecutive data from register 0051H.
(Commands to change of target temperature (=30.0
o
C) and offset temperature (=0.50
o
C)
Request message
Response message
Code
Contents
Code
Contents
01
Slave Address
01
Slave Address
10
Function
10
Function
0051
Head address of specified register
0051
Head address of register to write
0002
Quantity of register to write
0002
Quantity of register to write
04
Quantity of byte to read
9C
LRC
0BB8
Information written to 0051H
(Target temperature)
0032
Information written to 0052H
(Offset temperature)
A3
LRC
This product
(Request):011000510002040BB80032A3 [CR][LF]
(Response):0110005100029C [CR][LF]
Your system
Data is sent and
received in ASCII
code.

SMC Networks HECR Series Specifications

General

Brand	SMC Networks
Model	HECR Series
Category	Chiller
Language	English