Hello,
To read from S7-1200 you should use settings in your PLC like at the attached file. To read array you should setup Tag's data type Array and choose element type you need.
There is no graphical object that displays Array as a table, you should draw this object yourself by using Rectangle and Line graphical objects and display elements of the in cells.
To get elements of the array you should use scripts.
Best regards,
Ruslan