Microscan Quadrus EZ, User Manual, Page: 40 / 366

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Quadrus EZ Reader User’s Manual
RS-232 Auxiliary Port
Half Duplex Mode
Usage:
Useful when the user wants symbol data displayed on an auxiliary menu
close to the reader.
Definition:
In Half Duplex mode all auxiliary port data and symbol data is sent directly
to the host. Symbol data is displayed on the auxiliary port menu at the same
time the data is sent to the host.
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 with-
out 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
• Data is transmitted to the auxiliary port at the
same time it is transmitted to the host.
• Data transmission conforms with all parameters
specified in the configuration menu (e.g., Pream-
ble, Postamble, End of Read Cycle).
Data is initiated from the Host
• All host data is echoed to the auxiliary port in
unpolled mode.
Serial Cmd:
< K101,aux port mode ,baud rate,parity,stop bits,data bits>
2 = Half Duplex
Reader
Host
Aux
Port
Reader
Host
Aux
Port
Reader
Host
Aux
Port