6 - 14 Symbol LS2208 Product Reference Guide

Hardware Handshaking
The data interface consists of an RS-232 port designed to ope rate 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 bec omes available. Select Standard RTS/CTS
handshaking to transmit scan data according to the following sequ ence:
•
The 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 negate the CTS line. If, after the Host Serial Response Time-out (default), the CTS
line is still asserted, the scanner sounds a transmit er ror, and discards any scanned data.
•
When the CTS line is negated, the scanner asserts the RTS line a nd 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 the Host
Serial Response Time-out (default), the CTS line is not asserted, the scanner sounds a transmit error, and
discards the data.
•
When data transmission completes, the scanner negates RTS 10 msec after se nding the last character.
•
The host should respond by negating CTS. The scanner checks for a negated CTS upon the next data
transmission.
During data transmission, the CTS line should be asserted. If CTS is deasserted for more than 50 ms between
characters, the transmission aborts, and the scanner sounds a tra nsmission error and discards the data.
If this communications sequence fails, the scanner iss ues an error indication and discards the data. You must
rescan the data.
If hardware handshaking and software handshaking are both en abled, hardware handshaking takes precedence.

None

Scan the bar code below to disable hardware handshaking.
*None

Standard RTS/CTS

Scan the bar code below to select Standard RTS/CTS hardware handshaking.
Standard RTS/CTS
NOTE The DTR signal is jumpered to the active state.