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Micrologix 1100 “Modbus RTU” DELTA VFD-M

Delta VFD-M inverter is an extremely popular type of inverter of DELTA, with low price and high quality, it is widely used in many factories and machines. However, now this type of inverter has been discontinued to be replaced by newer inverters.

Today plc247.com will guide you to use the Allen-Bradley MicroLogix 1100 PLC to control it via the built-in Modbus-RTU RS485 Communication.

DELTA VFD-M & MicroLogix 1100 ” Wiring Diagram”

The RS485 port of the VFD-M is a 6Pin RJ-11 Port (Deskphone Jack)

DELTA VFD-M Modbus-RTU Configuration

You can set the following parameters:

Control Register Address
Note: MicroLogix 1100 Address = “VFD Address (Dec) + 1
  • 2000 (hex) = 8192 (dec)

>>> Address for Control Motor = 8192 + 1 = 8193 (dec)

+ Run Forward > Set Word 8193 = 0000 0000 0001 0010 (binary) =12(hex) = 18 (dec)

+ Run Reserved > Set Word 8193 = 0000 0000 0010 0010 (binary) =22 (hex)= 34(dec)

+ Stop > Set Word 8193 = 0000.0000.0000.0001 = 1 (dec)

  • 2001 (hex) = 8193 (dec)

>>> Address for Frequency Setting = 8193 + 1= 8194 (dec)

Monitoring Register Address

plc247.com read 5 output registers including: Frequency Command, Output Frequency, Output Current, DC-BUS Voltage, Output Voltage.

  • 2102 (hex) = 8450 (dec)

>>> Start Register Address for Monitoring = 8450 + 1 = 8451 (dec)

MicroLogix 1100 Communication Settings

+ Channel Settings

PLC MicroLogix 1100 Programming

+ Auto Read/Write Distribution

+ Motor Control Run Command

+ Frequency Reference Command

+ Data Monitoring

Detailed Instruction Video

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