Hello friends!
Delta VFD-M inverter is a popular type of inverter in the market, but now it has been discontinued and replaced by other types of inverters such as Delta MS300, Delta VFD-L…
Delta VFD-M has a built-in RS485 communication port to help it support Modbus-RTU communication protocol, today plc247.com will use Mitsubishi QJ71C24N to connect to control and monitor it.
Mitsubishi QJ71C24N & Delta VFD-M “Wiring Diagram”
Note: To connect to the RS485 port of Delta VFD-M we can use the desk phone Jack (RJ11) to connection
Delta VFD-M Modbus Parameters Setting
In addition to the basic parameters of the inverter installed according to the motor, we need to install the following communication parameters to be able to control the Delta VFD-M inverter through the Modbus-RTU protocol.
+ Pr00 = 03 – Setting Frequency via RS485
+ Pr01 = 04 – Motor Control Run via RS485
+ Pr88 = 01 – Modbus Slave = 1
+ Pr89 = 01 – Baud Rate 9600bps
+ Pr92 = 04 – Modbus RTU ( 8bit, stopbit = 1, Even )
+ Pr157 = 01 – Modbus-RTU Selection
Delta VFD-M Registers Address
>>> Motor Control Address = 2000 (Hex)
- Set 2000 (Hex) = 0000.0000.0001.0010 (Bin) = 18 (dec) >>> Forward Run
- Set 2000 (Hex) = 0000.0000.0010.0010 (Bin) = 34 (dec) >>> Reverse Run
- Set 2000 (Hex) = 0000.0000.0000.0001 (Bin) = 1 (dec) >>> Stop
>>> Setting Frequency Address = 2001 (Hex)
+ Output Frequency Address = 2103 (Hex)
+ Output Current Address = 2104 (Hex)
+ DC-BUS Voltage Address = 2105 (Hex)
+ Output Voltage Address = 2106 (Hex)
Mitsubishi QJ71C24N Modbus-RTU Configuration
Here are the steps to install the parameters for the QJ71C24N Module
+ Step 1: New Project
+ Step 2: I/O Assigment
+ Step 3: RS485 Parameters Setting
+ Step 4: Write parameters to Module
+ Step 5: Disable “Echoback”
- Echoback references to the function in which data transmitted by RS-485 (2-wire) is returned about the local station’s “RDA and RDB”.
- Echoback references to the function in which data transmitted by RS-485 (2 wires) is returned about the local station’s “RDA and RDB”.
Protocols Configuration
>>> Protocol No.1: Func = 06 / Write Single Registers
- Slave Address = D100
- Register Adress = D101
- Register Value = D110
- “Error Code” = D300
>>> Protocol No.2: Func = 03 / Read Holding Registers
- Slave Address = D200
- Starting Address = D201
- Quantity of Registers = D202
- Registers Value Response = D210 “From D210…D335 depending on the number of Registers (D202) to read”
- “Error Code” = D300
QJ71C24N “Modbus RTU” Example
+ Disable “Echoback” & Error Clear
+ Communication Distribution
+ Setting Frequency
+ VFD Control Command
+ Read Data Response
+ HMI Control Panel
Video Tutorial
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Related Software and Documents
+ Mitsubishi GX-Works 2 Software Download
+ Mitsubishi Q03UDV & Weintek HMI “Connection Tutorial”
+ Delta VFD-M Manual PDF Download
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If in the process of using the Mitsubishi Q-Series PLC to control the Delta VFD-M inverter, you need any support, please comment below the article, plc247.com will reply to you as soon as I read the comments.
Thanks and Best Regards!
