Motorola LS3478 - Manual (Page 214)

14 - 4 Symbol LS3478 Product Reference Guide
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 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 Disable All Rule Sets on page 14-8 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
page 14-8 .
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 match (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.