Full Duplex Mode - Microscan MS-3 Manual Book

Chapter 2

Full Duplex Mode

Definition: In Full Duplex mode all auxiliary port data and bar code data is sent
directly to the host. Bar code data is not displayed on the auxiliary port
screen.
Data initiated from the Auxiliary Port
• Auxiliary port data to the host is ignored if the
scanner is in a polled mode.
• Auxiliary port data or scanned data is sent to
the host whenever it is received.
• Auxiliary port data is not echoed.
• Auxiliary port data to the host is always sent
without a preamble or a postamble.
• <D> is the only command that is accepted by the scanner from the
auxiliary port. All other commands are passed through to the host.
Data initiated from the Scanner
• Scan data is not sent to the auxiliary port.
Data initiated from the Host
• All host data is echoed to the auxiliary port in
unpolled mode.
Usage: When communication to and from the auxiliary port is required.
Serial Cmd: <K101,aux port
ID status,daisy chain ID>
3 = Full duplex
MS-3 Laser Scanner User's Manual
mode,baud rate,parity,stop bits,data bits,daisy chain
Communications
Aux
Host
Port
Scanner
Aux
Host
Port
Scanner
Aux
Host
Port
Scanner
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