Full Duplex Mode - Microscan Quadrus EZ Reader User Manual

Full Duplex Mode

Usage: When communication to and from the auxiliary port is required.
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 menu.
Data initiated from the Auxiliary Port
• Auxiliary port data to the host is ignored if the
reader is in a polled mode.
• Auxiliary port data or read 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 reader from the auxil-
iary port. All other commands are passed through to the host.
Data initiated from the Reader
Definition:
• 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.
<K101,aux port
status,daisy chain ID>
Serial Cmd:
3 = Full duplex
Quadrus EZ Reader User's Manual
mode,baud rate,parity,stop bits,data bits,daisy chain ID
Communications
Aux
Host
Port
Reader
Aux
Host
Port
Reader
Aux
Host
Port
Reader
2-15