Symbol LS 3408, Product Reference Manual

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LS 3408 Product Reference Guide 14-6
Alternate Rule Sets
ADF rules may be grouped into one of four alternate sets which can be turned on and off when
needed. This is useful to format the same message in different ways. For example, a Code 128 bar
code contains the following information:
Class (2 digits), Stock Number (8) digits, Price (5 digits)
This bar code might look like this:
245671243701500
where:
Class = 24
Stock Number = 56712437
Price = 01500
Ordinarily, data is sent as follows:
24 (class key)
56712437 (stock key)
01500 (enter key)
But, when there is a sale, send only the following:
24 (class key)
56712437 (stock key)
and the cashier keys the price manually.
To implement this, first enter an ADF rule that applies to the normal situation. This 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, send the data that remains, send the Enter key.
The “sale” 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.
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