Microscan MS-710, User Manual

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Chapter 3 Communications
MS-710 Scanner User’s Manual
3-5
3–Communica
ti
ons
Point-to-Point with RTS/CTS
Point-to-Point with XON/XOFF (Transmitter On/Off)
Point-to-Point with RTS/CTS & XON/XOFF
Polling Mode D
Usage: A scanner initiates a data transfer with an RTS (request-to-send) trans-
mission. The host, when ready, responds with a CTS (clear-to-send) and
the data is transmitted. CTS and RTS signals are transmitted over two
dedicated wires as defined in the RS-232 standard.
Used only with RS-232.
Definition: Point-to-Point with RTS/CTS (request-to-send/clear-to-send) is a
simple hardware handshaking protocol that allows a scanner to initiate
data transfers to the host.
Serial Cmd: < Kf1 >
Usage:
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.
Definition: This option enables the host to send the XON and XOFF command as a
single byte transmission command of start (^Q) or stop (^S).
Serial Cmd: < Kf2 >
Usage: Used only with RS-232.
Definition: This option is a combination of Point-to-Point with RTS/CTS and
Point-to-Point with XON/XOFF.
Serial Cmd:
<
Kf3
>
Usage: When in Polling Mode D, an address of 1 is automatically displayed on
the configuration screen. However, during transmission, a 1C hex poll
address (FS) and a 1D hex select address (GS) are substituted for the 1.
Definition: Like Point-to-Point, Polling Mode D requires a dedicated connection to
the host; but unlike
Point-to-Point, it requires an address and must
wait for a poll from the host before sending data.
Serial Cmd: < Kf4 >