Microscan MS-3 Manual Book page 40

Protocol
Polling Mode D
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.
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.
Serial Cmd: <K140,4>
Multidrop
Definition: Multidrop allows up to 50 devices to be connected to a single RS485
host, with the scanner assigned an unique address (from 01 to 50).
Usage: The MS-5000 can be used as a concentrator to a single host port con-
nection.
When Multidrop is selected, the protocol characters for RES, REQ, etc.
are assigned automatically.
Multidrop Each address has its own separate poll and select address (from 1C to
Addresses:
7F hex).
Options: 01 through 50
Serial Cmd: If selecting Multidrop fan address must be defined and appended to
the command string.
Format: <K100,5,address[01 to 50]>
Note: Scanners linking up to a Microscan MS-5000 multidrop concentrator must be
configured in standard multidrop protocol.
User Defined Point-to-Point
Definition: User Defined Point-to-Point allows the user to customize the point-
to-point protocol.
Usage: Useful for developing custom protocols in polled or unpolled mode.
Serial Cmd: <K140, 6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>
MS-3 Laser Scanner User's Manual
3-6