Alternate Rule Sets - Symbol LS1900 Series Product Reference Manual

LS1900 Series Product Reference Guide

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 when you want 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 you would send this data as follows:
24 (class key)
56712437 (stock key)
01500 (enter key)
But, when there is a sale, you may want to send only the following:
24 (class key)
56712437 (stock key)
and the cashier will key the price manually.
To implement this, you would 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
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