DSC - can't acknowledge or clear a user defined event

Question

I wrote this code for alarms but now I have modified it to handle events.  So, first create the event (create alarm button), then try to acknowledge it or clear it.  There should be a time inserted for acknowledging and clearing.  It does't work.  I have used the exact event URL to acknowledge it.  Please help.
Thanks
Matt
Attachments:
User Defined Alarms.vi ‏52 KB

Answer 1

Hi Matt,
Thank you for attaching the new code, I didn't realize there was a path in that constant since the original box was so small. Part of the problem you are seeing actually lies within that path, you should be locating to \\*\Process Name\UserDefinedAlarm now that you switched from working with events to alarms. Also, you are still using the Set User Defined Event.vi and Read Events.vi, which need to move over to their Alarm counterparts.
Once you have those changes made, you need to alter the way you are trying to acknowledge the alarms. The problem isn't within logging the time but that the alarms are not being acknowledged at all. If you use the Read Alarms.vi and then wire the "alarms" output into the acknowledge function then it will acknowledge all of the active events (you may have to change the acknowledge type to Alarms). If you only want to acknowledge a single alarm at a time then you will need to trim down that cluster to focus on your selected alarm.
Finally, the way you are logging to the multicolumn listbox is not functioning correctly. I would suggest you look at the DSC Alarms Demo example (Help » Find Examples... » Toolkits and Modules » Datalogging and Supervisory Control » Alarms and Events » DSC Alarms Demo.lvproj). In that example there is a subVI, which is not part of the Alarms & Events palette but probably should be, named Format Alarm Data.vi. It is used in the first three examples under that project and should work better for logging all of your alarm interaction than searching through the database.
Regards,
Peter W.