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Chapter 2 Communications

MS-880 Industrial Long Range Scanner User’s Manual 2-9

2–Communications

Tra ns par en t Mo d e

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.

• Auxiliary port data is passed through to the

host whenever a return key is pressed at the

auxiliary port or whenever bar code data is

sent. If sent with bar code data, it is processed

on a first-in/first-out basis.

• 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 still 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 mode.

Usage: A common application, in conjunction with handheld scanners, is one

that employs an auxiliary readout to detect mis-applied bar code labels.

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

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 311 312

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