Master Polling Protocol; Point-To-Point Protocol - Intermec Trakker Antares 243X User Manual

Chapter 3— Operating the Terminal in a Network
XON/XOFF and CTS/RTS flow control. In Frame mode, you can also
configure the following serial port parameters:
• Configuration commands via serial port
• Handshake
• LRC
• SOM
After you enable Handshake, you can define poll and timeout delay.

Master Polling Protocol

Master Polling Mode D protocol requires the terminal to ask the downline
serial device for data it may have (polling) and to request to send data to
the serial device (selecting). There is no automatic polling, so your
application must poll periodically for data.
Before each transmit operation, the terminal issues the SEL sequence for
the device addressed and sends the data if an acknowledge is received.
Before each receive operation, the terminal issues a poll sequence and waits
for data or the RES character (no data is available to send).
You can configure the following serial port parameter:
• Baud rate

Point-to-Point Protocol

Point-to-Point protocol is not directly supported on the terminals.
However, you can simulate this protocol by setting the protocol to
Configurable and configuring these parameters:
• Baud rate
• Data bits
• Parity
• Stop bits
• Flow control
• EOM (Set EOM1 to \x0D, which is <CR>, and set EOM2 to \x0A,
which is <LF>)
• LRC (Disable)
• Handshake (Disable)
With this protocol, you cannot configure values for intercharacter delay,
turnaround delay, and timeout delay. This protocol supports CTS/RTS
flow control only.
Trakker Antares 243X Handheld Terminal User's Manual 53