Rules hierarchy (in bar codes), Rules hierarchy (in bar codes) -7 – Wasp Bar Code Wasp Duraline WLS 8400 FZ User Manual
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Advanced Data Formatting
10-7
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.
bar code on page 10-11 be scanned after
programming a rule belonging to an alternate rule set.
In addition to enabling and disabling rule sets within the rules, it is possible to enable or
disable them by scanning the appropriate bar codes on
.
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 the most general rule is
the last 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.
If a Code 128 bar code of length 12 were scanned, the THIRD rule would be in effect. The
SECOND rule would appear to not function.
Note also that ADF rules are actually created when the standard data editing functions are
used. Scan options are entered as ADF rules, and the hierarchy mentioned above also
applies to them. For the scanner, this applies to prefix/suffix programming in the parameter
Scan Data Transmission Format.