HRB1684301-12

Using an Ethernet gateway to set up RS-485

You can use an Ethernet gateway to connect to the meter and configure RS-485 settings.
NOTE: Configuring the serial communications settings using this method may cause ION Setup to lose communications when the changes are sent to your meter. You must reconfigure ION Setup to match the new settings to re-establish communications with your meter.
  1. Disconnect all serial devices presently connected to the Ethernet gateway’s RS-485 port.
  2. Configure the Ethernet gateway’s serial port settings to match the meter’s default serial communications settings:
    • Baud rate = 19200
    • Parity = Even
  3. Connect the meter’s RS-485 port to the Ethernet gateway.
  4. Connect the Ethernet gateway to the LAN.
  5. Start ION Setup in Network mode.
  6. Add an Ethernet gateway site and set its properties:
    • IP address = IP address of the Ethernet gateway
    • Port = 502 (for Modbus RTU)
  7. Add a meter to the site and set its properties:
    • Type = PowerLogic™ PM5xxx power meter
    • Unit ID = 1
  8. Use the RS-485 Base Comm setup screen to modify the meter’s serial communications settings.
  9. Click Send to save your changes to the meter.
    NOTE: If you set the protocol to ASCII 7, ASCII 8 or Jbus, you cannot use ION Setup to reconnect to the meter – ION Setup does not communicate using these protocols.
    Parameter Values Description
    Protocol Modbus RTU, Jbus, ASCII 8, ASCII 7 Select the communications format used to transmit data. The protocol must be the same for all devices in a communications loop.
    NOTE: ION Setup does not support ASCII 8, ASCII 7 or Jbus protocols.
    Address 1 to 247

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

    This value is used in both Modbus TCP/IP and serial communications.

    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.
    Parity 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.
Reconfigure ION Setup to match the changed settings in order to re-establish communications with your meter.
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