Read Cycle
MS-860 Industrial Raster Reader User’s Manual
7-13
Non-delimited Start and Stop Characters
Note: If the serial trigger character that you assign is already assigned as an opera-
tional command—for example a “Z” character that is used in the
<Z>
command—the
command will no longer function as intended.
Both
Start and Stop non-delimited characters can be defined and will function accord-
ing to the trigger event, as follows:
When defining
Start and Stop trigger characters, the following rules apply:
• In
External Edge the reader looks only for the start trigger character and ignores
any stop trigger character that may be defined.
• In
External Level, the start trigger character begins the read cycle and stop trigger
character
ends it. Note that even after a symbol has been decoded and the symbol
data transmitted, the reader remains in
External Level trigger read cycle until a
Stop character is received.
• In
Serial Data & Edge trigger mode, command, either a Start Trigger Character
or a hardware trigger can start an
Edge trigger read cycle.
Start Character (non-delimited)
Stop Character (non-delimited)
See Appendix E,
"ASCII Table"
, for ASCII character information.
Usage:
Useful in applications where different characters are required to start and
end a read cycle.
Definition:
A single ASCII host serial trigger character that starts the read cycle and
is not enclosed by delimiters such as
<
and
>
.
Serial Cmd:
<
K229,start trigger character
>
Default:
Null
(disabled)
Options:
Two hex digits representing an ASCII character except
<
,
>
,
XON
and
XOFF
.
Usage:
Useful in applications where different characters are required to start and
end a read cycle.
Definition:
A single ASCII host serial trigger character that ends the read cycle and is
not enclosed by delimiters such as
<
and
>
.
Serial Cmd:
<
K230,stop trigger character
>
Default:
Null
(disabled)
Options:
Two hex digits representing an ASCII character except
<
,
>
,
XON
and
XOFF
.
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