Wasp Bar Code WPS100 - Manual (Page 223)

9-5
Advanced Data Formatting
To switch between the two sets of rules, a “switching rule” must be programmed. This rule
specifies what type of bar code must be scanned to switch between the rule sets. For
example, 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 on page 9-11 after
programming a rule belonging to an alternate rule set.
In addition to enabling and disabling rule sets within the rules, you can enable or disable
them by scanning the appropriate bar codes on
9-11.
Rules Hierarchy (in Bar Codes)
The order of programming individual rules is important.The most general rule should be
programmed last.
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 last one programmed.