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Attribute checks: Can only be "Read-only" for Inputs Can only be "Write" or "Free" for Outputs Inputs cannot have an initial value Retain variables cannot have an initial value Database-level Validation The system validates the database. When saving, the system checks: IEC 61131 functions have one (and only one) Output parameter, named as the function Function and function block parameter names are not duplicated Parameters are ordered (Input then Outputs) Variable names are not duplicated within a resource Local variable names: are not duplicated within a POU do not have the same name as a global variable within a Structure, a field in not repeated the Maximum number of function and function block parameters respects target capabilities 154 DS800 Development Suite 2.1 - User Manual
