Rockwell Automation Logix5000 Controllers Add-on Instructions Programming Manual - Manual (Page 65)

Defining Add-On Instructions Chapter 2
a. For the logic routine, describe execution of the instruction when
EnableIn is true.
b. For the EnableInFalse routine (if one exists), describe actions that
will take place when EnableIn is false, such as any outputs that get
cleared.
c. For the Prescan routine (if one exists), briefly describe actions that
will take place during the Prescan routine, such as initialization of
any parameters.
d. For the Postscan routine (if one exists), briefly describe actions
that will take place during the Postscan routine, such as
initialization of any parameters resetting any internal state of the
instruction.
6. Click the Help tab on the Add-On Instruction Definition Editor and type
additional information in the Extended Description field.
The extended description can include the following information:
• Additional parameter information
• Description of how the instruction executes
• Change history notes
7. Review the Help format in the preview window.
This is an example of the Logix Designer application generated help for the
instruction. This information is gathered from the definition descriptions that you
complete when defining an instruction.
Rock well Automati on Publication 1756- PM010F-EN-P - Oct ober 2014 65