Communications Menu
MS-850 Raster Scanner User’s Manual
2-7
2–Menu C
o
n
fig
.
Data initiated from the Host
• All host data is echoed to the aux port in unpolled mode.
Half Duplex Mode
In half duplex mode all aux port data and bar code data is
sent directly to the host. Bar code data is displayed on the
aux port screen at the same time the data is sent to the
host.
Data initiated from the Aux Port
t
• Aux Port data to the host is ignored if the scanner is in a
polled mode.
• Aux Port data or scanned data is sent to the host when-
ever it is received.
• Aux Port data is not echoed.
• Aux Port data to the host is always sent without a pream-
ble or a postamble.
• <D> is the only command that is accepted by the scanner from the aux port. All other
commands are passed through to the host.
Data initiated from the Scanner
• Scan data is transmitted to the aux port at the same time
it is transmitted to the host.
• Data transmission conforms with all parameters specified
in the configuration menu (e.g., Preamble, Postamble,
End of Read Cycle).
Data is initiated from the Host
• All host data is echoed to the aux port in unpolled mode.
Full Duplex Mode
In full duplex mode, all aux port data and bar code data is
sent directly to the host. Bar code data is not displayed on
the aux port screen.
Aux.
Port
Host
MS-850
Aux.
Port
Host
MS-850
Aux.
Port
Host
MS-850
Aux.
Port
Host
MS-850
