The read-only 'Formal Parameter' dialog displays the properties of formal parameters of functions and function blocks.
The dialog is called by double-clicking on the formal parameter name (inside the FU/FB symbol), or by right-clicking on the parameter name and selecting the context menu item 'Object Properties...'.
The dialog displays the following information:
'Name' indicates the name of the formal parameter.
'Type' indicates the parameter type (input or output).
'Data type' indicates the IEC 61131 data type of the formal parameter.