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On this question, some suggestions from our support team:
If you want to log at a certain time each day, it would be best to configure the Historic Data Log to be based on a Start Trigger with the number of samples set to 1. Also configure a Notification to reset the trigger.
In your PAC Control strategy, you would add an integer variable to be used as the trigger. Then add logic such that when the time you want to log occurs, you set the trigger. PAC Display will scan this integer variable and when it see's the value you've configured for the trigger, it will log a sample of data. The notification then sets the variable back to 0. Your PAC Control strategy logic will have to take into account that it should only set the trigger when there is a transition from the previous time being before the event time and the current time being after the event time.
It would also be good to configure PAC Display to sync the controller time to PC time daily because the controller time can drift.
Hoping that helps! Let us know how you go....