Transparent Mode - Microscan MS-4X User Manual

Auxiliary Port Connections

Transparent Mode

Usage: A common application, in conjunction with handheld imagers, is one that
employs an auxiliary readout to detect misapplied symbols.
Definition: In Transparent Mode, data is passed between the auxiliary port and the
host. The imager buffers data from the auxiliary port and echoes the keyed
data on the auxiliary port.
• Auxiliary port data is passed through to the
host whenever a return key is pressed at the
auxiliary port or whenever symbol data is
sent. If sent with symbol data, it is processed
on a first-in/first-out basis.
• Auxiliary port data to the host is always sent
with a preamble and postamble.
• If the imager is in a polling mode with the
host, auxiliary port data will still pass
through.
Data Originating from the Imager
• Transmission to the auxiliary port occurs
immediately upon a good read.
• Data sent 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 Originating from the Host
• All host data is echoed to the auxiliary port in
unpolled mode.
Serial Cmd: <K101,aux port
status,daisy chain i.d.>
Options: 1 = Transparent
3-12
mode,baud rate,parity,stop bits,data bits,daisy chain i.d.
Aux.
Host
Port
Imager
Aux.
Host
Port
Imager
Aux.
Host
Port
Imager
MS-4X Imager User's Manual