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Chapter 2 Communications
MS-3 Laser Scanner User’s Manual 2-7
2–Communications
Transparent Mode
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.
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 bar code data is sent.
Whenever aux port data is sent with bar code
data, the aux port data will appear between
the preamble and the bar code 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
immediately 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 and polled mode.
Usage: A common application, in conjunction with handheld scanners, is one
that employs an auxiliary readout to detect mis-applied bar code sym-
bols.
Serial Cmd: <K101,aux port mode,baud rate,parity,stop bits,data bits,daisy chain
ID status,daisy chain ID>
1 = Transparent
Scanner
Host
Aux
Port
Scanner
Host
Aux
Port
Scanner
Host
Aux
Port
Scanner
Host
Aux
Port
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