Configuring serial settings using the webpages

NOTE: Refer to Restoration of temporarily disabled configuration settings in webpages to know availability of these features on your meter model.

The Serial Settings webpage allows you to configure the meter’s RS-485 communications.

  1. Login to the meter webpages.
  2. Based on your meter firmware version, click Settings > Serial Settings OR click Settings > Communication > Serial Port Configuration .
  3. Modify the serial settings as required.
  4. Click Save changes or Apply Changes.
    NOTE: Click Defaults to reset the advanced serial port settings to their default values.
    Parameter Values Description


    Slave, Gateway

    Set this to Gateway to enable the Ethernet gateway functionality. Set this to Slave if you are adding the meter as a downstream device to an RS-485 network.


    Modbus, Jbus, ASCII 8 Bit, ASCII 7 Bit

    Select the communications format used to transmit data. The protocol must be the same for all devices in a communications loop.

    NOTE: The protocol must be set to Modbus RTU or Jbus if you are using the meter as an Ethernet gateway.


    1 to 247

    Set the address for this device. The address must be unique for each device in a communications loop.

    Baud Rate

    9600, 19200, 38400

    Select the speed for data transmission. The baud rate must be the same for all devices in a communications loop.


    Even, Odd, None

    Select None if the parity bit is not used. The parity setting must be the same for all devices in a communications loop.

    Modbus Broadcast

    Enabled, Disabled

    Set this to Enabled to if you want the gateway meter to forward broadcast messages (sent to Unit ID 0) to the downstream serial devices.

    Response Timeout *

    0.1, 0.2, 0.3, 0.4, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

    Set the time the gateway meter waits for an answer from a downstream serial device before generating an exception response.

    Delay Between Frames *

    0, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100

    The minimum time in milliseconds between the end of a received response and the beginning of a new request.

    Set this parameter to help improve communications between the gateway and downstream slave devices with slower response times.

    Silent Interval Extension *

    0 – 15

    Set this parameter to extend the silent interval (used to mark the end of a Modbus packet) beyond the default 3.5 characters defined in the Modbus standard. After the defined character time elapses without a new character, the gateway meter treats the next character as the start of a new message.

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