Hello everyone. Mitsubishi FR-E700 Series inverter is an extremely popular inverter in the world with the advantages of high quality, compact size and low price.
Today plc247.com would like to share with you the detailed connections of Siemens S7-1200 PLC (combined with CB 1241 RS485 module) to control the FR-E720 inverter via Modbus-RTU communication
S7-1200 & FR-E720 Wiring Diagram
FR-E720 Parameter Configuration
The communication parameters to be able to communicate with Modbus-RTU are in the table below:
You set according to the following parameters:
- Pr117: = 1
- Pr118: = 3
- Pr119: = 0
- Pr120: = 2
- Pr121: = 9999
- Pr122: = 9999
- Pr123: = 9999
- Pr124: = 1
- Pr340: = 1
- Pr549: = 1
- Pr79: = 2 ( Last Setting )
Modbus_Register_Address
Looking at the table above we can see:
+ Setting Frequency = 40014 (dec)
+ Motor Control Address = 40009 (dec)
- Forward Run – Set 40009 = 0000.0000.0000.0010 = 2
- Reverse Run – Set 40009 = 0000.0000.0000.0100 = 4
- Stop command – Set 40009 = 0000.0000.0000.0000 = 0
Data Output Monitor
In the plc247.com project read 3 consecutive registers including: 40201, 40202, 40203
>>> Starting address = 40201 (dec) / Leght bit = 3
Siemens S7-1200 Configuration
CB1241 RS485 Module Configuration
Modbus Block Build
S7-1200 PLC Programming
+ Distributing Transmission
+ Communication Load
+ Setting Frequency Command
+ Control Motor
+ VFD Status Feedback
S7-1200 Modbus RTU Video
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Document & Software:
- Download Mitsubishi FR E700 VFD Manual PDF (Password: plc247.com)
- Download Step7 & WinCC Professional for Siemens S7-1200 PLC
So today plc247.com has shown you how to connect S7-1200 and VFD Mitsubishi.
Thanks and BR!
