Hello everyone, Mitsubishi E700 Series inverter is one of the most commonly used inverter series in the world. Compact design, easy installation, durable, and it also supports control via Modbus RTU (RS485) easily.
Today plc247.com will use MicroLogix 1400 PLC to connect and control Mitsubishi FR E720 via Modbus RTU, FR-E700 Series inverter has a built-in RS485 Port.
MicroLogix 1400 & FR-E720 VFD “Wiring Diagram”
Note: Use Module 1763-NC01 for easy wiring, or you can also connect it directly to the MiniDIN-8Pin port of the MicroLogix 1400 PLC.
Mitsubishi FR E700 “Modbus RTU” Configuration
In addition to the basic parameters of the inverter installed according to the motor used (frequency, current, voltage…) we need to install additional communication parameters as follows:
- Pr117: 1 (Slave Address)
- Pr118: 3 (Baudrate 9600)
- Pr119: 0 (8bit, stop bit = 1)
- Pr120: 2 (Even)
- Pr121: 9999
- Pr122: 9999
- Pr123: 9999
- Pr124: 1
- Pr340: 1
- Pr549: 1
- Pr79: 2 (Last Setting)
FR E720 Registers for Control
>>> VFD Control Address = 40009
- Set Word 40009 = 0000 0000 0000 0010 = 2 >>> Forward Run
Set Word 40009 = 0000 0000 0000 0100 = 4 >>> Reverse Run
Set Word 40009 = 0000 0000 0000 0000 = 0 >>> Stop
>>> VFD Control Address = 40014
FR E720 Registers for Monitoring
+ Output Frequency Address = 40201
+ Output Current Address = 40202
+ Output Voltage Address = 40203
MicroLogix 1400 “Modbus RTU” Parameters Setting
In order for the MicroLogix 1000 PLC to control the FR E720, we need to set the communication parameters of the PLC to be the “same as the FR-E720” VFD
PLC Programming Example
+ Communication Distribution
+ VFD Control Command
+ Frequency Setting Command
+ Data Monitoring Command
Project Video Tutorial
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Recommended Documents
+ Download MicroLogix 1400 Manual PDF
+ Mitsubishi FR E700 Manual PDF Download
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If you have any difficulties in the process of using the Allen-Bradley MicroLogix 1400 PLC to control the FR-E720 Inverter via Modbus RTU, please comment below the article, plc247.com will reply to you as soon as I read the comment.
Best Regards!
