SMC Networks HRS100 Series, Operation Manual

Page: 47 / 84

HRX-OM-S010
Chapter 4 MODBUS communication function
HRS100/150 Series 4.8 Explanation of function codes
4-13
4.8.3 Function code
：
16 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
○Slave Address: No 1
○Write two consecutive data from register 000Bh
.
(Commands to change of circulating fluid set temperature <39.9
o
C > and run.)
Request message Response message
Code Contents Code Contents
01 Slave Address 01 Slave Address
10 Function 10 Function
000B Head address of specified register 000B Head address of register to write
0002 Quantity of register to write 0002 Quantity of register to write
04 Quantity of byte to read E2 LRC
018F Information written to 000Bh (Circulating
fluid set temperature)
0001 Information written to 000Ch (Stop flag)
4D LRC
(Request):0110000B000204018F00014D [CR][LF]
(Response):0110000B0002E2 [CR][LF]
Your system This product
Data is sent and
received in ASCII
code.