Hello everyone!
Danfoss FC51 inverter is a cheap but very good quality inverter from Europe. It supports basic control methods such as Keypad, I/O Control, Modbus RTU…
- Mitsubishi FX5U “Modbus RTU” PowerFlex 525 VFD Tutorial
- Danfoss FC51 “Modbus RTU” via Modbus Poll Software
Today plc247.com will guide you to use the Mitsubishi FX5U PLC to control Danfoss FC51 via Modbus-RTU (both have built-in RS485 Communication Port.)
Mitsubishi FX5U & Danfoss FC51 “Wiring Diagram”
Note: A 120Ω terminal resistor should be used if the communication distance between PLC and VFD is long distance.
Danfoss FC51 Modbus RTU Configuration
To be able to control Danfoss FC51 with Modbus-RTU we need to configure the following communication parameters:
Danfoss FC51 Registers for Control
- VFD Control Address = C34F (hex)
+ Set Registers C34F = 47C (hex) or 1148 (dec) >>> Forward Run
= 847C (hex) or 33916 (dec) >>> Reverse Run
= 43C (hex) or 1084 (dec) >>> Stop
= 4BC (hex) or 1212 (dec) >>> VFD Reset
- VFD Frequency Setting Address = C359 (hex)
>>> Reference Setting = 0 to 16384(dec) ~ (0 to 100%)
Danfoss FC51 Registers for Monitoring
- Output Voltage Address = 16120 – 1 = 16119 (dec)
- Output Frequency Address = 16130 – 1 = 16129 (dec)
- Output Current Address = 16140 – 1 = 16139 (dec)
Mitsubishi FX5U Modbus RTU Setting
The FX5U’s Modbus communication parameters need to be set to the same as those of the Danfoss FC51
FX5U Modbus Programming
+ Reset Control & Read/Write Distribution
+ VFD Control Command
+ Read Data Response
Project Video Tutorial
======
Related Software and Documents
+ Download GX Works3 Software for PLC Mitsubishi Programming
+ Danfoss FC51 Design Guide Download
+ Danfoss FC51 Programming Guide Download
Password Extract: plc247.com
Please comment and share the article to the community if you find this article interesting and useful.
Thanks and Best Regards!
