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6 QS2500

RS-232

CTS = Clear To Send (Hardware Signal)

RTS = Request To Send (Hardware Signal)

Xon = Transmit On (ASCII Code 1116)

Xoff = Transmit Off (ASCII Code1316)

Flow Control

None:

The communication uses only TxD and RxD signals, without

regard for any hardware or software handshaking protocol.

RTS/CTS:

If the QS2500 wants to send the bar code data to the host

computer, it will issue the RTS signal first, wait for the CTS signal

from the host computer, and then perform the normal data commu-

nication. If there is no replied CTS signal from the host computer

after the timeout (response delay) duration, the QS2500 will issue

five warning beeps.

Xon/Xoff:

When the host computer is unable to accept data, it sends

an Xoff code to inform the QS2500 to suspend data transmission

and an Xon to continue.

ACK/NAK:

When the ACK/NAK protocol is used, the QS2500 waits

for an ACK (acknowledge) or NAK (not acknowledge) from the

host computer after data transmission. It then resends the data in

response to a NAK.

Power-On Simulation

Disable 00*

Enable 01

Intercharacter Delay

0–99 (msec.)

00–99

02*

Block Transmission Delay

0–99 (10 msec.)

00–99

10*

Option Bar Code Option Alphanumeric Entry

Exi

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PSC Scanners Manual do Utilizador Página 10