Configuring serial settings using the webpages

Mode

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.

Protocol

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.

Address

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.

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.

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 These are advanced settings that you can adjust if you have communications errors when communicating through the gateway to the downstream serial devices. They only apply if the meter is functioning as a gateway, and you should only change these settings if you have an advanced knowledge of Modbus communications and your communications network.*

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 These are advanced settings that you can adjust if you have communications errors when communicating through the gateway to the downstream serial devices. They only apply if the meter is functioning as a gateway, and you should only change these settings if you have an advanced knowledge of Modbus communications and your communications network.*

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 These are advanced settings that you can adjust if you have communications errors when communicating through the gateway to the downstream serial devices. They only apply if the meter is functioning as a gateway, and you should only change these settings if you have an advanced knowledge of Modbus communications and your communications network.*

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.