Microscan MS-7100 User Manual page 37

Selecting: Has this effect:
Point-to-Point with Used only with RS-232. It is a combination of Point-to-
RTS/CTS and Point with RTS/CTS and Point-to-Point with XON/XOFF.
XON/XOFF
Polling Mode D Like Point-to-Point, Polling Mode D requires a separate
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. 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.
a
Multidrop Similar to Polling Mode D except that a unique poll
address and select address are required for each
Note: Scanners
multidrop device, and only one host port connection is
intended to link
needed for up to 50 devices. (For Multidrop poll and select
up to a Microscan
characters, see
MS-5000 multi-
Characters," on page
drop concentrator
Requires a concentrator or controller using RS-485
can only be con-
communications. When Multidrop is selected, the protocol
figured in stan-
characters for RES, REQ, etc. are assigned automatically.
dard Multidrop
protocol. (See Table A-3, "Multidrop Address Characters," on page
A-24 for poll and select sequences.)
User Defined Used only with RS-232 or RS-422. ASCII characters can
be assigned as an address and as protocol commands
(RES, REQ, EOT, STX, ETX, ACK, and NAK). User
Note: A specific
Defined is necessary when a new protocol must be
ASCII character
must not be as- defined to match a specific host protocol. When User
signed more Defined is selected, the displayed protocol commands
than once.
match those of the previously selected protocol. User
Defined is considered to be in a polled mode only if an
address has been assigned. The address can be any
ASCII character from the ASCII in appendix B, except
b
NUL.
MS-7100/7180 Industrial Scanner User's Manual
Communications Menu
Table A-3, "Multidrop Address
A-24.)
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