Microscan EZ Match Imager Manual de usuario Pagina 81

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EZ Match User Manual
4-13
Communications
Transparent Mode
Auxiliary port data is passed through to the
ho
st whenever a return key is pressed at th
e
auxiliary
port or whenever symbol data
is
sen
t. If sent with symbol data, it is processe
d
on
a first-in/first-out basis.
Auxiliary port data to the host is always sent
with a pr
eamble and post
amble.
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
a
lways in Point-to-Point protocol, even if t
he
h
ost is in a polled protocol mode.
Data Originating from the Host
All host data is echoed to the auxiliary port in
u
npolled 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.
Serial Cmd: <K101,aux port mode,baud rate,parity,stop bits,data bits,daisy chain i.d.
status,daisy chain i.d.>
Options: 1 = Transparent
Host
Aux.
Port
Imager
Host
Aux.
Port
Imager
Host
Aux.
Port
Imager
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