User Manual

Rockwell Automation Publication 1752-UM001E-EN-P - June 2014 157

Create Your Application Program Chapter 10

Precautions for Reusing User-defined Function Blocks

This table indicates which actions require user-defined function block files and

describes what happens if the action is attempted without the function block file.

Additional Resources

Table 11 - Outcomes Without Function Block Files

Action File Outcome

Download Not required Operates normally

Upload Not required Operates normally

Save project file Not required Operates normally

Load project file Not required Operates normally

Verification Required Program verification can be completed even without the function block

file once the file is downloaded to the controller, but the function block

configuration cannot be checked.

Edit the program Required A warning message will appear if the Logic Editor is opened without the

function block file. The user-defined function block without a file will

appear with a icon and any connections to or from it are deleted.

Editing features such as copy and paste are not available. If the program

is edited in any way, it cannot be saved or downloaded.

Apply program Required This command cannot be executed without the user-defined function

block file.

TIP

If you import the user-defined function block file with the program open, it

will not automatically update. Close the program and open it again to

display the function block correctly.

IMPORTANT

Always check the original program after editing user-defined function

blocks. If you created a user-defined function block, used it in the original

program, and edited the function block after the original program was

saved, the function block occurrence in the program is not updated.

Resource Description

, Logic Functions Command Reference Provides detailed information on the logic functions.

, Function Blocks Command Reference Provides detailed information on the function blocks.