Hi. Today plc247.com would like to continue to write an article to guide you to use LabView to control inverters via Modbus-RTU RS485 Communication Standard.
And the type of inverter selected for control today is Mitsubishi FR E700 Series, this is an extremely popular inverter in the world with the advantages of low price and good quality.
Computer & FR E700 VFD “Wiring Diagram”
Mitsubishi FR E700 Modbus RTU Parameters Setting
Below are the communication parameters that need to be set up of the FR E700 inverter that can communicate with Modbus RTU:
- Pr117 = 1 (Address Slave Number)
- Pr118 = 3 (9600bps)
- Pr119 = 0 (8bit/Stop:1bit)
- Pr120 = 2 (Parity: Even)
- Pr121 = 9999
- Pr122 = 9999
- Pr123 = 9999
- Pr124 = 1
- Pr340 = 1
- Pr549 = 1
- Pr79 = 2 (Last Setting)
Register for Control Address
Address where holding register data write will be started Starting address = “Starting register address (decimal)-40001”
>>> Register Control Address = 40009 – 40001 = 8
- Set Word 8 = 2 >>> Forward Run
= 4 >>> Reverse Run
= 0 >>> Stop
>>> Register Frequency Reference = 40014 – 40001 = 13
Register for Monitoring Address
In the plc247.com project read 3 consecutive registers including: 40201, 40202, 40203
- Output Frequency = 40201 – 40001 = 200 / Number Registers = 3
LabView Programming
+ Control Panel
+ Program
Video Tutorial
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References Document
- Download Mitsubishi FR E700 VFD Manual PDF (Password Extract: plc247.com)
If you have any questions about connecting LabView to control the FR E700 VFD, please comment below the article, plc247.com will answer as soon as I read it.
Best Regards!
