SanDisk CompactFlash 5000 Bedienerhandbuch PDF herunterladen (Seite 30)

Publication LOGIX-AP007B-EN-P - January 2007

30 Example Application

6. Find the tag execute_CF_Delete_File.

7. Enter a 1 in the value field and press Enter.

The tag will go back to a 0. This indicates that the application has

attempted to delete your file.

8. Find the tag CF_Delete_Seq_Status and click + to expand the tag.

This is a user-defined data type (UDT). As the tag name indicates, this

will give you status on the file sequence. There is an element of the UDT

called Status. It should be equal to 1. This means that the file was

deleted successfully.

If another value is present, refer to AppendixC, Troubleshoot the

CompactFlash File System.

Build an Example

You will build an example application with the waffle recipe from the last

chapter.

1. Open the file CF_Read_Write_V3_2_Example.ACD.

This code will handle four recipes.

In the controller organizer under the MainProgram, you will see a

routine called Recipe_Manager. This routine shows a basic recipe

manager and how to interface into the baseline CompactFlash

application.

Rung zero is used to make sure that you do not try and access two

recipes at the same time or change a CompactFlash command when one

is currently executing. All you would need to do is enter a value of 1, 2,

3, or 4 in Recipe_Number and a value of 1 to 4, depending on the

CompactFlash command you want into Recipe_Command.

1 = create

2 = write

3 = read

4 = delete

There are four rungs remaining; each rung is for a different recipe. In

this example, you are only going to look at one of them.

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SanDisk CompactFlash 5000 Bedienerhandbuch Seite 30