Microscan MS-820 User Manual page 42

Transparent Mode
Usage: Often used in conjunction with handheld scanners. Employs an auxiliary
readout to detect mis-applied bar code symbols.
Definition: In Transparent mode data is passed between the auxiliary port and the
host. The scanner buffers data from the auxiliary port and echoes the
keyed data on the auxiliary port. I
Data initiated from the Auxiliary Port
• Auxiliary port data is passed through to the host whenever a return
key is pressed at the auxiliary port or symbol data is sent.
• Whenever aux port data is sent with symbol
data, the aux port data will appear between the
preamble and the symbol data.
• Auxiliary port data to the host is always sent
with a preamble and a postamble.
• If the scanner is in a polled mode to the host,
auxiliary port data will NOT pass through.
• <D> is the only command accepted by the
scanner from the auxiliary port. All other commands will pass through
to the host.
Data initiated from the Scanner
• Transmission to the auxiliary port occurs imme-
diately upon a good read.
• Scan data to the auxiliary port does not include
a preamble or a postamble.
• Communications with the auxiliary port is
always in Point-to-Point protocol, even if the
host is in a polled protocol mode.
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>
1 = Transparent
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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