Polling Mode D - Microscan MS-9 User Manual

Point-to-Point with RTS/CTS
A scanner initiates a data transfer with an RTS (request-to-send) trans-
Usage:
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.
Point-to-Point with RTS/CTS (request-to-send/clear-to-send) is a
Definition:
simple hardware handshaking protocol that allows a scanner to initiate
data transfers to the host.
Serial Cmd: <K140,1>
Point-to-Point with XON/XOFF (Transmitter On/Off)
If an XOFF has been received from the host, data will not be sent to the
Usage:
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
Definition:
single byte transmission command of start (^Q) or stop (^S).
<K140,2>
Serial Cmd:
Point-to-Point with RTS/CTS & XON/XOFF
Used only with RS-232.
Usage:
This option is a combination of Point-to-Point with RTS/CTS and
Definition:
Point-to-Point with XON/XOFF.
Serial Cmd: <K140,3>

Polling Mode D

When in Polling Mode D, an address of 1 is automatically displayed on
Usage:
the configuration screen. However, during transmission, a 1C hex poll
address (FS) and a 1D hex select address (GS) are substituted for the 1.
Like Point-to-Point, Polling Mode D requires a dedicated connection to
Definition:
the host; but unlike Point-to-Point, it requires an address and must
wait for a poll from the host before sending data.
<K140,4>
Serial Cmd:
Chapter 3 Communications
MS-9 Scanner User's Manual
3-5