Factory Automation

MELSEC-F series N:N Network

    Features

    1. 1.Data link can be realized by a simple program with connecting up to 8 units of FX PLC.
    2. 2.The bit device (0 to 64 points) and word device (4 to 8 points) have been automatically linked among each station. The ON/OFF state of other stations and data register values can be obtained by the device allocated on the local station.

    Applicable communication device

    RS-485 communication device

    Model Applicable FX PLC
    FX
    3S     		FX
    3G     		FX
    3U     		FX
    3GC     		FX
    3UC
    Function expansion board FX3G-485-BD *5
    ○
    Max.
    1 unit     		○
    Max.
    2 units
    *1     		× × ×
    FX3G-485-BD-RJ *5
    ○
    Max
    1 unit     		○
    Max.
    2 units
    *1     		× × ×
    FX3U-485-BD × × ○
    Max.
    1 unit     		× *2
    ○
    Max.
    1 unit
    Specific adapter FX3U-485ADP-MB *6
    ○
    Max.
    1 unit     		*3
    ○
    Max.
    2 units
    *1     		*4
    ○
    Max.
    2 units     		○
    Max.
    2 units     		*4
    ○
    Max.
    2 units
    • *1FX3G 14 pt, 24 pt models: 1 board. 40 pt, 60 pt models: 2 boards.
    • *2Can be connected only to the FX3UC-32MT-LT(-2).
    • *3When connecting to FX3G, FX3G-CNV-ADP is required.
    • *4When connecting to FX3U, FX3UC-32MT-LT(-2), function expansion board is required.
    • *5Function expansion board and FX3S-CNV-ADP cannot be used together.
    • *6When connecting to FX3S, FX3S-CNV-ADP is required.

    System configuration example

    System configuration example

    Specifications

    Items Specifications
    Transmission standard Conforming to RS-485 standard
    Total extension length When all communication modules used are special adapter: 500 m
    When function expansion board is used or included in system: 50 m
    Communication method/Transmission speed Half-duplex bidirectional, 38400 bps
    No.of connectable units Max. 8 units
    Link points Pattern 0 Bit device: 0 points, Word device: 4 points (FX3S, FX3G, FX3U, FX3GC, FX3UC)
    Pattern 1 Bit device: 32 points, Word device: 4 points (FX3S, FX3G, FX3U, FX3GC, FX3UC)
    Pattern 2 Bit device: 64 points, Word device: 8 points (FX3S, FX3G, FX3U, FX3GC, FX3UC)
    Link refresh time (ms) Pattern 0 Based on the no. of connection units, 2 units (18), 3 units (26), 4 units (33), 5 units (41), 6 units (49), 7 units (57), 8 units (65)
    Pattern 1 Based on the no. of connection units, 2 units (22), 3 units (32), 4 units (42), 5 units (52), 6 units (62), 7 units (72), 8 units (82)
    Pattern 2 Based on the no. of connection units, 2 units (34), 3 units (50), 4 units (66), 5 units (83), 6 units (99), 7 units (115), 8 units (131)
    Connection device
    with PLC     		FX3S FX3G-485-BD(-RJ) or FX3S-CNV-ADP + FX3U-485ADP-MB
    FX3G FX3G-485-BD(-RJ) or FX3G-CNV-ADP + FX3U-485ADP-MB
    FX3GC FX3U-485ADP-MB
    FX3U,
    FX3UC *     		FX3U-485-BD or Function expansion board + FX3U-485ADP-MB
    Applicable FX PLC FX3S, FX3G, FX3U, FX3UC
    • *Function expansion board cannot be connected to FX3UC-**MT/D, FX3UC-**MT/DSS and FX3UC-16MR/D(S)-T. Specific adapter can be directly connected.