Microscan Quadrus Verifier, User Manual

Page: 191 / 470

Quadrus Verifier User’s Manual
6-13
Read Cycle
Serial Trigger
Serial Trigger Character (Delimited)
Note: Serial Data or Serial Data or Edge triggering mode must be enabled for Serial
Trigger Character to take effect.
Start and Stop Trigger Characters (Non-Delimited)
Usage: Allows the user to define the trigger character and delimiters that start and
stop the read cycle.
Definition: A serial trigger is considered an online host command and requires the
same command format as all host commands: that is, to be entered within
angle brackets delimiters
< and > or in the case of non-delimited triggers,
define individual start and stop characters.
Usage: Allows the user to define the trigger character that initiates the read cycle.
Definition: A single ASCII host serial trigger character that initiates the read cycle.
A delimited trigger character is one that either starts or ends the read cycle
and is enclosed by delimiters such as
< and > .
Serial Cmd: < K201,serial trigger character >
Default: Spacebar (corresponds to <SP> displayed in the embedded menu)
Options: Any single ASCII character, including control characters, except NULL ( 00 ),
an existing host command character, or an on-line protocol character. Con-
trol characters entered on the command line are displayed in the menu as
mnemonic characters.
Usage: It is useful in applications where different characters are required to start
and end a read cycle.
Definition: A non-delimited trigger character is one that either starts or ends the read
cycle and is NOT enclosed by delimiters such as
< and > .
Both Start and Stop non-delimited characters can be defined and will
function according 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 end trigger character that may be defined.
• In External Level , the start trigger character begins the read cycle and
end 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 and Edge trigger mode, command, either a start trigger
character or a hardware trigger can start an edge trigger read cycle.