User`s guide

Configure Physical Serial Ports
Chapter 5 Configure Ports 99
Special Use of Serial Port when Data is Processed in Chunks
Some applications are written to process only chunks of data rather than
continuous streams of data. The Digi Passport unit supports chunking, or
holding back data from the serial device to the application on the network until
it detects a delimiter - at which point it sends the data to the application.
To configure a port for this mode:
1. Open a web connection to the Digi Passport unit.
2. Select Serial Port > Configuration.
3. Select All ports to configure.
4. Select Host Mode configuration.
5. Under Protocol, select RawTCP.
6. Click Save & apply.
7. Select Serial port parameters.
8. Configure the delimiter and supporting settings.
• Enable/Disable delimiter: Allows delimiter to function.
• Delimiter: The sequence that should be received before forwarding the
data to the application
• Delimiter option: Specifies handling of the delimiter in data sent to the
application:
with delimiters: Sends the delimiter as part of the data to the applica-
tion.
without delimiters: Removes the delimiter before sending the data to
the application.
• Inter character time-out timeout: Timeout, in milliseconds.If no
delimiter is detected the data is delivered after this timeout has elapsed.
The range is 1-10000.