Unitech Hand Held Scanner Bedienungsanleitung PDF herunterladen (Seite 14)

Operating Parameters

Device Type

Baud Rate, Parity and Data Bit:

These parameters set the scanner's communication protocol that must be

matched by the host. The default setting for the serial interface is 9600 baud rate,

none parity, and 8 data bit.

　 Baud Rate can be 300, 600, 1200, 2400, 4800, 9600, 19200, or 38400

bps.

　 Parity can be even, odd, space, mark, or none.

　 Data Bit can be 7 or 8 long.

The scanner may not support settings with Data Bit as 7 and Parity as none

combination. Such combination is treated as 7 data bits with MARK parity.

Handshaking:

The scanner supports CTS/RTS handshaking as an option. The hardware

handshaking is supported on character-by-character basis.

During the communication, the scanner will stop sending data until the CTS is

valid within time specified by the Time Out parameter. During this time-out

waiting period:

If CTS is valid.

If CTS is not valid, the scanner sounds an error beep and discards the

current buffered data.

BCC Character:

BCC check character is calculated for entire data stream by using "Exclusive

OR" method. it is sent after data stream for data verification.

Time Out:

You can adjust the Time Out duration for handshaking and ACK/NAK protocol

to fit applications.

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Unitech Hand Held Scanner Bedienungsanleitung Seite 14