User Defined Point-To-Point - Microscan MS-9 User Manual

RS-232/422 Host Port
Multidrop
Note: See also
"Multidrop Communications" on page
The MS-5000 can be used as a concentrator to a single host port connec-
Usage:
tion.
Multidrop allows up to 50 devices to be connected to a single RS-485
Definition:
host, with the scanner assigned an unique address (from 01 to 50). When
Multidrop is selected, the protocol characters for RES, REQ, etc. are
assigned automatically.
Each address has its own separate poll and select address (from 1C to 7F
Multidrop
Addresses: hex).
Options: 01 through 50
Serial Cmd: If selecting Multidrop <K140,5> fan address must be defined and
appended to the command string.
Format: <K140,5,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

Used for developing custom protocols in polled or unpolled mode.
Usage:
User Defined Point-to-Point allows the user to customize the point-to-
Definition:
point protocol.
<K140,6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>
Serial Cmd:
User Defined Address
Definition: User Defined is considered to be in a polled mode only if an address has
been assigned.
Serial Cmd: <K140,6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>
Default: No address
Any ASCII character except a null.
Options:
User Defined Example
An ACK/NAK protocol can be configured using User Defined. The scan-
Example:
ner will transmit data to the host when an ACK is received. If a NAK or
response timeout occurs, the scanner will re-send the data to the host up
to 3 more times before aborting.
<K140,6,RES,address,REQ,EOT,STX,ETX,ACK,NAK,from host>
Serial Cmd:
Default: No assignment
Any ASCII character except a null. Control characters can be used to
Options:
define RES through NAK in serial commands.
MS-9 Scanner User's Manual
3-6
A-32.