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RS-232 Handshaking
RS232 Handshaking allows control of data transmission from the scanner using
software commands from the host device. When RTS/CTS is turned Off, no
data flow control is used.
RTS/CTS
The scanner asserts RTS when it has data to send, and waits indefinitely for
CTS to be asserted by the host.
Default = RTS/CTS Off.
XON/XOFF
Standard ASCII control characters can be used to tell the scanner to start send-
ing data (XON/XOFF On) or to stop sending data (XON/XOFF Off). When the
host sends the XOFF character (DC3, hex 13) to the scanner, data transmission
stops. To resume transmission, the host sends the XON character (DC1, hex
11). Data transmission continues where it left off when XOFF was sent.
Default = XON/XOFF Off
.
ACK/NAK
After transmitting data, the scanner waits for an ACK character (hex 06) or a
NAK character (hex 15) response from the host. If ACK is received, the commu-
nications cycle is completed and the scanner looks for more bar codes. If NAK
is received, the last set of bar code data is retransmitted and the scanner waits