Good morning Friends,
I have below data logging requirements in our current project.

• Data Logging should be at 8.00AM and 8.00PM daily. Basically data logging should be event triggered at specific time of the day.
• At specific interval (e.g. 15 mins) starting from the specific time. i.e. data should log at settable interval (e.g. 15 OR 30 OR 60 mins) and should start from set time (e.g. 8.00 AM onwards).

I tried configuring logger tag with "Expression" and "Tag" option by using "IO & Calculation" memory tag however couldn't get proper data logging as required.

Can anyone guide me if there is any better way to achieve this?

Thank you.

Can I ask what you are trying to acheive? Is your goal to report the values in specific intervals? Are you trying to only poll data at specific times, or are you trying to only log polled data at specific intervals? For any of the answers, can you please describe in more detail why as it will help with the direction we would recommend for your solution.

Thank for your support.
I am trying to log polled data at specific intervals. Requirement is to generate the daily excel report which should include only hourly data starting from 8.00AM for 24 hours. Hence logging should be at every one hours starting 8.00AM.

As of release 12.1.42, you can use the minimum logging interval property in the I/O and Calc Tags since it has changed as follows: Values will be logged on interval OR on change but not both. Therefore you can set the minimum log interval to 3600 to trigger a log once per hour.

That said, I don't believe that this is the best approach - I would recommend that you leave the Minimum Log Interval at 0 and simply use the reporting tools to create an built-in hourly Snapshot Report. You can create triggers and report tags to set these reports to run automatically by schedule or event.

It'll create a CSV for the tags you have selected and output the following style of data:

Hourly Snapshot Report from Aug 9, 2026 08:00:00 to ...(Sample)
Date Time Bernoulli_Lake\Site_Driver\BypassLossVolume
09-Aug-26 08:00:00 2.681662753
09-Aug-26 09:00:00 2.681662753
09-Aug-26 10:00:00 2.681662753
09-Aug-26 11:00:00 2.681662753
09-Aug-26 12:00:00 2.681662753
09-Aug-26 13:00:00 2.681662753
09-Aug-26 14:00:00 2.681662753
09-Aug-26 15:00:00 2.681662753
09-Aug-26 16:00:00 2.681662753
09-Aug-26 17:00:00 2.681662753
09-Aug-26 18:00:00 2.681662753
09-Aug-26 19:00:00 2.681662753
09-Aug-26 20:00:00 2.681662753
09-Aug-26 21:00:00 2.681662753
09-Aug-26 22:00:00 2.681662753
09-Aug-26 23:00:00 2.681662753
10-Aug-26 00:00:00 2.681662753
10-Aug-26 01:00:00 2.681662753
10-Aug-26 02:00:00 2.681662753
10-Aug-26 03:00:00 2.681662753
10-Aug-26 04:00:00 2.681662753
10-Aug-26 05:00:00 2.681662753
10-Aug-26 06:00:00 2.681662753