Microscan QX-830 User Manual page 91

Protocol Options
Point-to-Point (Standard)
Used only with RS-232 or RS-422.
Standard Point-to-Point requires no address and sends the data to the host whenever it
is available, without a request or handshake from the host.
Point-to-Point with RTS/CTS
A scanner initiates a data transfer with an RTS (request-to-send) transmission. The host,
when ready, responds with a CTS (clear-to-send) and the data is transmitted. RTS and
CTS signals are transmitted over two dedicated wires as defined in the RS-232 standard.
Used only with RS-232.
Point-to-Point with RTS/CTS (request-to-send/clear-to-send) is a simple hardware
handshake protocol that allows a scanner to initiate data transfers to the host.
Point-to-Point with XON/XOFF
If an XOFF has been received from the host, data will not be sent to the host until the host
sends an XON. During the XOFF phase, the host is free to carry on other chores and accept
data from other devices. Used only with RS-232.
This option enables the host to send the XON and XOFF command as a single byte
transmission command of start (^Q) or stop (^S).
Point-to-Point with RTS/CTS and XON/XOFF
Used only with RS-232.
This option is a combination of Point-to-Point with RTS/CTS and Point-to-Point with
XON/XOFF.
ACK/NAK
See ACK / NAK Options.
Polling Mode
See Polling Mode
QX-830 Compact Industrial Scanner User's Manual
Options.
Scanner Parameters
5-25