Hello friends, in previous posts plc247.com guided you to use some PLC / HMI and also PC to control Danfoss FC302 inverter via Modbus RTU RS485
Today plc247.com will guide you to use the Keyence KV Series PLC in combination with the KV-L21V Module (supports Modbus RTU) to control Danfoss FC302
Keyence KV-L21V & Danfoss FC302 “Wiring Diagram”
Note: If the communication distance is far, we need to add a 120Ω Terminal Resistor
Danfoss FC302 Modbus RTU Configuration
To be able to control the inverter by Modbus RTU we need to set the following communication parameters
Registers for Control
>>> VFD Control Address = C34F (hex)
- Set Word 50000 = 1148 (dec) >>> Run Forward
= 33916 (dec) >>> Run Reverse
= 1084 (dec) >>> Stop
= 1212 (dec) >>> VFD Reset
>>> VFD Speed Setting = C359 (hex)
- Speed Reference = 0 to 16384 (dec) ~ (0 to 100%)
Register for Monitoring
- Voltage Output Address = 16119 (dec) = 3EF7 (hex)
- Frequency Output Address = 16129 (dec) = 3F01 (hex)
- Current Output Address = 16139 (dec) = 3F0B (hex)
- Speed Output Address = 16169 (dec) = 3F29 (hex)
PLC Keyence Modbus-RTU Setting
We need to set the communication parameters of Keyence KV-L21V and Danfoss FC302 the same.
PLC Keyence Programming
+ Read / Write Distribution
+ VFD Speed Setting
+ VFD Control Command
+ Data Response Monitoring
Project Video Tutorial
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Related Documents and Software:
>>> PLC Keyence Software Download
>>> Danfoss FC302 Manual PDF Download
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