User's Manual

Check Receive Errors

Select whether or not to check the parity, framing, and overrun of received

characters. The parity value of received characters is verified against the parity

parameter selected above.

Hardware Handshaking

The data interface consists of an RS-232 port designed to operate either with or

without the hardware handshaking lines, Request to Send (RTS), and Clear to

Send (CTS).

Disable Standard RTS/CTS handshaking to transmit scan data as it becomes

available. Select Standard RTS/CTS handshaking to transmit scan data according

to the following sequence:

z The digital scanner reads the CTS line for activity. If CTS is asserted, the

scanner waits up to Host Serial Response Time-out for the host to de-assert the

CTS line. If, after Host Serial Response Time-out (default), the CTS line is still

asserted, the scanner sounds a transmit error, and discards any scanned data.

z When the CTS line is de-asserted, the digital scanner asserts the RTS line and

waits up to Host Serial Response Time-out for the host to assert CTS. When the

host asserts CTS, the scanner transmits data. If, after Host Serial Response

Time-out (default), the CTS line is not asserted, the scanner sounds a transmit

error, and discards the data.

z When data transmission completes, the digital scanner de-asserts RTS 10 msec

after sending the last character.

z The host should respond by negating CTS. The digital scanner checks for a

de-asserted CTS upon the next transmission of data.

During the transmission of data, the CTS line should be asserted. If CTS is

deasserted for more than 50 ms between characters, the digital scanner aborts

transmission, sounds a transmission error, and discards the data.

If this communication sequence fails, the digital scanner issues an error indication.

In this case, the data is lost and must be rescanned.

If hardware handshaking and software handshaking are both enabled, hardware

handshaking takes precedence.

Note:

The DTR signal is jumpered to the active state.

z None: Scan this barcode to disable hardware handshaking.

z Standard RTS/CTS: Scan this barcode to select Standard RTS/CTS Hardware

Handshaking.