Once you tap on the Data Monitor button on Main Menu screen you switch to this Data Monitor screen. 

You see four tags from the tag group 'Digital Output' and their current values read from the controller (using the communication link selected in Comm Setup). Other tags in the group are accessed by the scrollbar. To change any tag value tap on the panel labeled 'I' on the I, M, C button (not implemented here). For continuous monitoring of a tag tap on the C panel (not implemented here).

Tap on Screens Menu to access other monitoring functions such as Graphic Monitor, Data Table etc.