MELSEC-F series

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)Number of channels: 1 2)Communication method: Half-duplex bidirectional 3)Insulation: Not insulate 4)Maximum transmission distance: 50 m 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)Number of channels: 1 2)Communication method: Half-duplex bidirectional 3)Insulation: Not insulate 4)Maximum transmission distance: 50 m 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)Number of channels: 1 2)Communication method: Half-duplex bidirectional 3)Insulation: insulate 4)Maximum transmission distance: 500 m 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

*1: Can be connected only to the FX3UC-32MT-LT(-2).
*2: When connecting to FX3UC-32MT-LT(-2), Function expansion board is required.
*3: For 14/24 point, maximum 1 unit.
*4: When connecting to FX3S, FX3S-CNV-ADP is required.
*5: When connecting to FX3G, FX3G-CNV-ADP is required.
*6: When 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

System configuration example

Connectable Mitsubishi general-purpose inverter

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