CLX Method to identify if program has changed?

[CanaanP 1]

Hi, I'm trying to implement a method to where I could easily tell if the program currently in a processor matches my latest copy or not - without having to connect to find out. We typically use the new L24's in our projects, and I was thinking maybe there is a way for me to write a checksum value of the program to a tag, which can then be displayed on the HMI. Sort of like a "Hi, my version is ..." in the bottom corner of the screen. Does anyone think this is possible? I sure would appreciate any input available - thanks!

[BobLfoot 301]

CHeck out this manual http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/1756-rm003_-en-p.pdf and pay attention to Controller Audit Value and/or ControllerLog Execution Modification Count on pg 192.

[CanaanP 1]

Ok, so if I'm looking at this correctly, I use SSV to set ChangesToDetect and set the flags I want to monitor. Then I use GSV to retrieve the AuditValue, which should change based on an event occurring that matches what flags I had set? I created a tag, ChangesToDetect, DINT[2] and set ChangesToDetect[0].1 to 1, as per table 4 this should monitor online edits. I created the tag AuditValue, DINT[2], and setup my SSV and GSV instructions. I performed an online edit, just added a rung with a contact and coil and accepted. My AuditValue never changed, so I am I looking at this all wrong?