LabView “Modbus RTU” Danfoss FC302 Tutorial

Hello, in previous posts plc247.com guided you to use some types of PLC, HMI to control Danfoss FC302 inverter via Modbus-RTU RS485

• PLC Micrologix 1100 “Modbus RTU” Danfoss FC302 Tutorial

Today plc247.com will continue to guide you to use LabVIEW software on PC to control Danfoss FC302 VFD (we need to prepare “USB to RS485” cable)

Danfoss FC302 & Computer “Wiring Diagram”

Danfoss FC302 Modbus-RTU Setting

In order for us to be able to control Danfoss FC302 with Modbus RTU, we need to set the communication parameters as shown in the table below

FC302 Registers Address for Control

>>> VFD Control Command = 49999

+ Set Word 49999 = 1148 (dec) >>> Run Forward
= 33916 (dec) >>> Run Reverse
+ Set Word 49999 = 1084 (dec) >>> Stop
+ Set Word 49999 = 1212 (dec) >>> VFD Reset

>>> Speed Reference Address = 50009
+ Speed Reference = 0 to 16384(dec) ~ (0 to 100%)

FC302 Registers Address for Data Monitoring

Note: Danfoss FC302 Address = “(Table Address*10) – 1“

• Voltage Output Address = 16119

• Frequency Output Address = 16129

• Current Output Address = 16139

• Speed Output Address = 16169

LabVIEW Modbus Programming

+ Front Panel

+ Block Diagram

Video Instruction

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Related Software and Documents

>>> Danfoss FC302 Manual PDF Download

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