Hello friends, Danfoss FC51 inverter is a popular inverter series, very compact in size, suitable for all common applications such as pumps, fans, conveyors, cooling towers, … the maximum capacity is 22kW, the biggest advantage of This inverter series is low cost.
It also has a built-in RS485 communication port suitable for control and monitoring by Modbus RTU (RS485). Today plc247.com will guide you to use PLC Inovance H3U-3232MT to control Danfoss FC51 through this protocol.
PLC Inovance & Danfoss FC51 “Connection Diagram”
Note: If the communication distance is long, we need to use an extra 120Ω terminal resistor
Danfoss FC51 “Modbus RTU” Parameters Setting
In addition to the basic parameters of the inverter installed according to the motor we use (frequency, current, voltage…) then we need to install the following communication parameters:
Danfoss FC51 “Modbus RTU” Registers Address
+ VFD Control Address = C34F (Hex)
- Set Word C34F = H47C (hex) >>> Run Forward
= H847C (hex) >>> Run Reverse - Set Word C34F = H43C (hex) >>> Stop
- Set Word C34F = H4BC (hex) >>> VFD Reset
+ Frequency Reference Address = C359 (Hex)
>>> Frequency Reference = (0 to 16384) = (0 to 100%)
>>> Output Voltage Address = 16119 (dec) = 3EF7 (Hex)
>>> Output Frequency Address = 16129 (dec) = 3F01 (Hex)
>>> Output Current Address = 16139 (dec) = 3F0B (Hex)
Project PLC Programming
+ COM.1 Configuration
+ Add Modbus Config
+ Modbus Setting & Programming
Video Tutorial
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Related Software and Documents
>>> Download PLC Inovance Programming Software
>>> Download Danfoss FC51 Inverter Manual PDF
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If in the process of using PLC Inovance H3U-3232MT to connect to Danfoss FC51 control via Modbus RTU, you have any difficulties, please comment below the article, plc247.com will answer you as soon as I read comments.
Best Regards!
PLC FATEK & Danfoss FC51 “Connection Diagram”
what model PLC Fatek ?