AML M3000 Guía de usuario descargar pdf (Pagina 106)

8-1

8Advanced Operations

Creating and Using a Lookup Table

A lookup table allows the programmer of an M3000 program to define lookup data within the

structure of the program. Lookup table data serves to restrict the contents of the input during data

entry. Unless allowed by a lookup option, only data listed in the lookup table will be accepted by the

program during input.

To illustrate the operation of a lookup table let's modify built-in program P4 so that the UOM (Unit of

Measure) input will accept only specific types of measurements.

For example:

1. Copy built-in program P4 into memory. For additional information on using the

Programming mode, refer to the M3000 User's Guide, Chapter 5 Programming.

2. Press FUNC + Right Arrow three times to advance to input record #3.

3. Use the Down Arrow to scroll down the program options list until the display shows:

Lookup Tbl/File

4. Enter the following:

TA,EA,DOZ,CTN,LBS,OZ

In this example the lookup table settings do the following:

T - Instructs the M3000 that the type of lookup is a "table" as opposed to a "file".

A - Is an option that allows mismatches, and will cause the M3000 to ask the user if

the data is acceptable anyway.

Abbreviations EA,DOZ,CTN,LBS,OZ are the only data inputs accepted by the program

without displaying an error message. In this case, since mismatches are allowed, the

M3000 displays the following message when a user enters anything other than the

allowable inputs:

Input Not Found

Accept Anyway?

Press the ENTER key.

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AML M3000 Guía de usuario Pagina 106