Aggregated data logs allow you to automatically compute aggregated data from regular data logs and alarms.
Usually, you have rough data recorded from your PLC in regular data logs. For example, you can be reading temperature values every 10 seconds and have them logged into the data log. Now imagine you would like to know the minimum, maximum and average temperature values per hour, per day and per month. This is where aggregated data logs come in play.
With aggregated data logs you can aggregate by
- time period (minutes, hours, days, …)
- some logged value change
- Alarm activation
You can compute statistics based on functions
- Count
- Sum
- Average
- Minimum
- Maximum
- Alarm time activation
- Alarm count
To create an aggregated data log, first create all sources – eg. Data logs you want to aggregate data from. Then you can start creating your data log.