Accessibility of members in TIA-Portal and internal interfaces - Manual - AX2TIA - This package contains the documentation for ax2tia - Converting SIMATIC AX libraries to TIA Portal libraries,

Data types such as structs, classes and function blocks from TIA Portal are accessible as variables in SIMATIC AX library blocks. Depending on the access modifier the Step 7 Accessibility is available as in the following table:

Program Organization Unit / User-defined data type	Section	Access Modifier	Step 7 Accessibility
User-defined data type	---	---	ReadWrite
Class	---	Public	ReadWrite
	---	Internal	ReadWrite
	---	Private	ReadOnly
	---	Protected	ReadOnly
	---	Without Modifier	ReadOnly
FB	Input		ReadWrite
	InOut		ReadWrite
	Output		ReadWrite
	Static	Public	ReadWrite
		Internal	ReadWrite
		Private	ReadOnly
		Protected	ReadOnly
		Without Modifier	ReadOnly