Microscan MS-3 User Manual page 73

Non-delimited Start and Stop Characters
Note: If the serial trigger is set to an existing command, it will override the command. The
command will no longer be valid. For example, if the serial trigger is <Z>, parameters will
no longer be saved, but when the save command is sent (<Z>), the reader will trigger.
Note: In multidrop and user-defined protocols, the start and stop characters must be
delimited.
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, either a Start Trigger Character or a hard-
ware trigger can start an Edge trigger read cycle.
Start Character (non-delimited)
Usage: It is 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
Default: Null
Options: Two hex digits representing an ASCII character except <, >, XON and
XOFF.
Stop Character (non-delimited)
Usage: It is 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
Default: Null
Options: Two hex digits representing an ASCII character except <, >, XON and XOFF.
See Appendix F — "ASCII Table"
character>
(disabled)
character>
(disabled)
for ASCII character information.
Chapter 4 Read Cycle
MS-3 Laser Scanner User's Manual
4-13