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DH1 BASE UNIT / DH2 WIRELESS GATEWAY
USER GUIDE
29.
MODBUS MASTER FUNCTION
Gateway’s Serial/RTU port and DH1 Base Unit’s RS485 port can be used to
set it as a Modbus Master device.
Supported Modbus Function Codes
1.
Read Holding Registers – FC3, int16, float
2.
Read Input Registers – FC4, int16
3.
Write Single Holding Register – FC6, int16
1.
Determine if using RTU or RS485 port
2.
Open a BreeZ® project file
3.
Access Gateway properties by clicking “E” button or right-clicking
and selecting “edit”
4.
RTU port method
a.
Click on desired RTU port tab
b.
Select Modbus Master for Mode of Operation
c.
Set port as RS232 or RS485
d.
Configure rest of settings
Controlled Copy