Rockwell Automation Logix5000 Controllers Add-on Instructions Programming Manual - Manual (Page 46)

Chapter 2 Defining Add-On Instructions
If you edit an Add-On Instruction by adding, deleting, renaming, reordering, or
changing the status or usage type of one or more parameters, RSLogix 5000
software, version 18 and later, automatically updates the arguments on calls to the
instruction.
Source-protected routines and other source-protected Add-On Instructions that use the edited Add-On
Instruction are not automatically updated if the source key is unavailable. The Add-On Instruction or
routine may still verify, but the resulting operation may not be as intended.
It is your responsibility to know where Add-On Instructions are used in logic when you make edits to
existing Add-On Instructions.
A confirmation dialog box shows you the impacts of the edits and lets you review
the pending changes before confirming or rejecting them.
• An asterisk identifies parameters with changes pending.
• Existing arguments are reset to the parameters they were originally
associated with.
• Newly added parameters are inserted with a ‘?’ in the argument field, except
for Structured Text, where the field is blank.
• Unknown parameters are created for arguments where associated
parameters have been deleted.
To accomplish this update, Logix Designer application tracks the changes made to
the Add-On Instruction parameters from the original instruction to the final
version. In contrast, the import and paste processes compare only parameter
names to associate arguments with parameters. Therefore, if two different
Updates to arguments
following parameter edits
46 Rockwell Automation Publication 1756-PM010F-EN-P - October 2014