Factory Automation

MELSEC-F series Inverter communication

Features

FX3 series PLCs have Mitsubishi inverter protocol and dedicated instructions for communication control built-in. Mitsubishi inverters can be easily controlled just by adding an RS-485 communication device.

Applicable communication device

RS-485 communication device

Model Features/Communication method Applicable FX PLC
FX
3S		 FX
3G		 FX
3U		 FX
3GC		 FX
3UC
FX3G-485-BD Function expansion board that can be added to the PLC
  1. 1)Number of channels: 1
  2. 2)Communication method: Half-duplex bidirectional
  3. 3)Insulation: Not insulate
  4. 4)Maximum transmission distance: 50 m
  5. 5)Control instruction: RS/RS2 instruction
 ○
Max.
1 unit		 *3
○
Max.
2 units		 × × ×
FX3G-485-BD-RJ ○
Max.
1 unit		 *3
○
Max.
2 units		 × × ×
FX3U-485-BD Function expansion board that can be added to the PLC
  1. 1)Number of channels: 1
  2. 2)Communication method: Half-duplex bidirectional
  3. 3)Insulation: Not insulate
  4. 4)Maximum transmission distance: 50 m
  5. 5)Control instruction: RS/RS2 instruction
 × × ○
Max.
1 unit		 × *1
○
Max.
1 unit
FX3U-485ADP-MB Special adapter that connects to the left side of the PLC
  1. 1)Number of channels: 1
  2. 2)Communication method: Half-duplex bidirectional
  3. 3)Insulation: insulate
  4. 4)Maximum transmission distance: 500 m
  5. 5)Control instruction: RS/RS2 instruction
 *4
○
Max.
2 units		 *3
*5
○
Max.
2 units		 *6
○
Max.
2 units		 ○
Max.
2 units		 *2
○
Max.
2 units
  • *1Can be connected only to the FX3UC-32MT-LT(-2).
  • *2When connecting to FX3UC-32MT-LT(-2), function expansion board is required.
  • *3For 14/24 point, maximum 1 unit.
  • *4When connecting to FX3S, FX3S-CNV-ADP is required.
  • *5When connecting to FX3G, FX3G-CNV-ADP is required.
  • *6When connecting to FX3U, function expansion board is required.

Inverter communication instructions

IVCK Operation monitor
IVDR Operation control
IVRD Parameter read
IVWR Parameter write
IVBWR Parameter batch write (FX3U(C) only)
IVMC Multiple command (2 types of settings and 2 types of read)

FX communication parameter setting window

FX communication parameter setting window

System configuration example

System configuration example

Connectable Mitsubishi general-purpose inverter

FREQROL series inverter (S500/E500/A500/F500/V500/D700/E700/A700/F700)