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P 300 STD/FZY/PRO Scanner Product Reference Guide
in the case of the “sale” rule above, the rule programmer wants the cashier to scan the bar
code “M” before a sale. To do this, a rule can be entered as follows:
When scanning a bar code of length 1 that begins with “M”, select rule set number 1
.
Another rule could be programmed to switch back.
When scanning a bar code of length 1 that begins with “N”, turn off rule set number 1.
The switching back to normal rules can also be done in the “sale” rule. For example, the rule
may look like this:
When scanning a bar code of length 15, send the next 2 characters, send the class key,
send the next 8 characters, send the stock key, turn off rule set 1.
It is recommended that you scan the
Disable All Rule Sets
bar code after programming a rule
belonging to an alternate rule set.
In addition to enabling and disabling rule sets within the rules, you can disable them by
scanning the appropriate bar codes in
Disable Rule Set
on page 3-13.
Rules Hierarchy (in Bar Codes)
The order of programming individual rules is important. The most general rule should be
programmed first.
All programmed rules are stored in a buffer. As they are programmed, they are stored at the
“top” of a rules list. If three rules have been created, the list would be configured as follows:
Third Rule
Second Rule
First Rule
When data is scanned, the rules list is checked from top to bottom to determine if the criteria
matches (and therefore, if the actions should occur). Input is modified into the data format
specified by the first matching set of criteria it finds. Be sure that your most general rule is the
first one programmed.
For example, if the THIRD rule states:
When scanning a bar code of any length, send all data, then send the ENTER key.
And the SECOND rule states:
When scanning a Code 128 bar code of length 12, send the first four characters, then
send the ENTER key, then send all remaining data.