User Defined Multidrop; Host Rs-422 Status - Microscan MS-9 User Manual

RS-232/422 Host Port

User Defined Multidrop

Note: Any ASCII character except a null (00) and a ^A (01) can be assigned as an
address. Control characters can be used to define RES through NAK in serial com-
mands. See (See
"Communication Protocol Commands" on page
Used when connecting to a concentrator or other device that does not
Usage:
match standard multidrop protocol.
User Defined Multidrop allows the user to customize the polling protocol.
Definition:
If selecting User Defined Multidrop (7), complete the format by either
choosing new parameters or place commas where unchanged data fields
occur.
Serial Cmd: <K140,7,RES,address,REQ,EOT,STX,ETX,ACK,NAK>
For User Defined Multidrop, first select Multidrop <K140,5>, then
User Defined Multidrop <K140,7...>.
Any single character (02 hex to 7E hex) in the ASCII table can be
Address:
assigned as the address character. The character chosen is used as the
poll character and the subsequent ASCII character becomes the select
character. For example, if a ^B (02 hex) is selected as the address, ^C
(03 hex) becomes the select address that the host will use in sending
host select commands.
Definitions of commands in User Defined and User Defined Multidrop must be dupli-
cated in host applications to enable poll and select sequences to execute correctly dur-
ing transmission.
Note: Typically, parameters in User Defined Multidrop are defined by first enabling
Multidrop, then enabling User Defined Multidrop. This pre-loads multidrop charac-
ters into the parameters. Then changes are made to individual characters to match the
host or other requirements.

Host RS-422 Status

Only changed if necessary to match host setting.
Usage:
Enables RS-422. When RS-422 is enabled, RS-232 is disabled.
Definition:
<K102,status>
Serial Cmd:
Default: Disabled
0 = Disabled
Options:
MS-9 Scanner User's Manual
3-8
1 = Enabled
A-19.)Note: