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 Environment Setting Section > Methods for Connecting and Communicating with External Devices > Communicating through Serial Communication (PLC Link) > Setting Communication Specifications (RS-232C/422-PLC Link)

Setting Communication Specifications (RS-232C/422-PLC Link)

Communication specifications such as link areas or communication speed and data length are set.
Setting Communication Specifications (Ethernet - PLC Link)
Important
  • Use the same communication specification settings for the controller and the external device.
  1. On the Main screen, tap the [System] menu - [Communication] - [Serial] - [RS-232C/RS-422].
    The serial interface window is displayed.
  2. In the communication setting area, set the following items.
    Serial interface - Communication settings
    Setting item
    Set value
    [Factory default]
    Description
    Interface
    • [RS-232C]
    • RS-422
    Adjust to the PC communication specifications.
    Baud rate [bps] [Note 1]
    • 2400
    • 4800
    • 9600
    • 19200
    • [38400]
    • 57600
    • 115200
    Adjust to the PC communication specifications.
    Data length [bit]
    • 7
    • [8]
    Adjust to the PC communication specifications.
    Parity
    • [OFF]
    • Odd
    • Even
    Stop bit [bit]
    • 1
    • [2]
    Flow control
    [OFF]
    Flow control is not performed with software.
    If the time in which there is no response from external devices reaches the timeout setting time, a timeout error occurs and an error message is displayed in the window.The parallel interface ERROR signal also turns on.
    Xon/Xoff
    Flow control is performed with software.Data is sent according to the Xon/Xoff codes from external devices.
    Timeout [s]
    1 to 120
    [5]
    Set the time in which a timeout error will occur in seconds.
    [Note 1]: If a speed of [38400 bps] or higher is selected, effective communication cannot be guaranteed depending on the cable length because speeds of over 20 kbps are not defined in RS-232C standards.In these cases, set the communication speed at [19200 bps] or lower.
  3. Tap [PLC Link setting].
    The PLC Link Setting window is displayed.
  4. Set the following items.
    Serial interface - PLC Link setting
    Setting item
    Set value
    [Factory default]
    Description
    Command area
    Area
    • [CIO Area(CIO)]
    • Work Area(WR)
    • Holding Bit Area(HR)
    • Auxiliary Bit Area(AR)
    • DM Area (DM)
    • EM Area(EMO)
    Set the "Communication" area.
    Address
    0 to 99999
    [0]
    Set the communication address.
    Response area
    Area
    • [CIO Area(CIO)]
    • Work Area(WR)
    • Holding Bit Area(HR)
    • Auxiliary Bit Area(AR)
    • DM Area (DM)
    • EM Area(EMO)
    Set the "Communication" area.
    Address
    0 to 99999
    [100]
    Set the communication address.
    Data output area
    Area
    • [CIO Area(CIO)]
    • Work Area(WR)
    • Holding Bit Area(HR)
    • Auxiliary Bit Area(AR)
    • DM Area (DM)
    • EM Area(EMO)
    Set the "Communication" area.
    Address
    0 to 99999
    [200]
    Set the communication address.
    Retry interval [ms]
    1000 to 999999
    [10000]
    Set the communication retry interval.
  5. Tap [OK].
    The settings are confirmed and the serial interface window closes.

Checking Communication Status

Use PLC tools, etc. to check the communication status.
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