Methods (POU)

A method is a reusable operation that belongs to a UDFB.

Methods allow complex UDFB behavior to be divided into smaller, purpose-specific routines, making applications easier to develop, understand, test, and maintain.

A method can have its own:

• Input parameters.
• Output parameters.
• Local variables.
• Implementation language (FBD, FFLD, or ST).

Similar to methods in object-oriented programming, a method is a reusable block of logic that belongs to a specific UDFB and can access the data and variables of their parent UDFB.

See:

• Why use Methods?
• Method Management
  • Call a Method
  • Create a Method
  • Define Method Parameters
  • Delete a Method
  • Import or Export Methods
    • Export a Method
    • Export a UDFB with All Associated Methods
    • Import a Method
    • Import a UDFB with All Associated Methods
  • Rename a Method
• Example: Packaging Machine Controller
• Debug a Method
• Method Restrictions
• Method Best Practices