We begins to use a TimeLineView scheduler grouped by resources with Progress OpenEdge 11.7..
It is possible to display an hours bar on the top under the days.
You can have a look at our Demo application >> Scheduler >> Timeline View example where are demonstrated the different time scales. In the Grouping example, you can right-click the header cell and select Hour time scale.
I hope this information helps. If you have any additional questions, please let me know.