PSC QuickScan 3000, Product Reference Manual

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QuickScan QS3000/QS3500 Product Reference Guide
Rules Hierarchy (in Bar Codes)
The order of programming individual rules is important.The most specific 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 specific 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 you use the standard data editing
functions. Scan options are entered as ADF rules, and the hierarchy mentioned above also
applies to them. For the QS3500, this applies to prefix/suffix programming in the parameter
Scan Data Transmission Format.
These rules reside in the same “rule list” as ADF Rules, so the order of their creation is also
important.