Auto-declare variable dialog box will pop up automatically when user declare a new variable name to POU, but,if user close this dialog box expectedly, can't open this by clicking "Enter"key why.
“Shift + F2 " can be used to display the "Auto declare" window again.In Continous Function Chart (CFC) mode, variables
have to be connected to something in order to get shift+F2 shortcut. This is normal because when an undeclared variable
is not connected, then this variable is not taken into account during compilation and no error happens.