Hello, could anyone give me some ideas on programming a application into a SLC 5/02. I have a project where I need to show how many times a fault has ocuured on a leak test in different time frames. It has a touchscreen that I am going to display the value on. I know how to just show the accumlative value , but the problem is I would like to show the history. Like how many times a condition has occured in the last 1 hour, 4 hours, 8 hours, etc. Is this even possible to do? It seems like it would be hard to do without every alarm starting a differnt timer. I do not want to use any other hardware, just PLC and touchscreen, and I just need advice on the PLC programming part. Thanks in advance and hope the explanation is clear enough.