Microscan MS-820 User Manual page 44

Full Duplex Mode
Usage: Used when communication to and from the auxiliary port is required.
Definition: In Full Duplex mode all auxiliary port data and symbol data is sent
directly to the host. Symbol 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.
Serial Cmd: <Kyaux port mode,baud rate,parity,stop bits,data bits,daisy chain ID
status,daisy chain ID>
3 = Full duplex
MS-820 Industrial Bar Code Scanner User's Manual
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Chapter 3 Communications
Aux
Host
Port
Scanner
Aux
Host
Port
Scanner
Aux
Host
Port
Scanner
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