Using a serial communications converter to set up RS-485
- Configure the serial communications converter’s settings to be compatible with the meter’s default communications settings.
- Connect the meter’s RS-485 port to the serial communications converter.
- Connect the communications converter to the computer.
- Start ION Setup in Network mode.
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Add a serial site and set its properties:
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Comm link = Serial
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Comm port = select which serial (or USB) port the communications converter is attached to
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Baud rate = 19200
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Format = select a format with even parity
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Add a meter to the site and set its properties:
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Type = PowerLogic™ PM5xxx power meter
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Unit ID = 1
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- Use the setup screens to modify the meter’s setup parameters.
- Use the RS-485 Base Comm setup screen to modify the meter’s serial communication settings.
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Click Send to save your changes
to the meter. You need to reconfigure
ION Setup
to match the changed settings in order to re-establish communications
with your 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.
- Exit ION Setup .
RS-485 port settings
| 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. 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. For Jbus protocol, set the device ID to 255. This value is used in both Modbus TCP/IP and serial communications. |
| Baud rate | 9600, 10200, 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. |