Historical data collector by example

 

The following example illustrates the application of “Historical Data Collector”

• You can log data:
  • every x seconds
  • every precise time
  • on a trigger
• You can also
  • • Reset all data
    • backup data on USB disk (Formatted FAT32) plugged on the HMI

Download this simple example (HMI project) :  TestHistoDataV3

You will find the .csv file on the USB disk after the backup:

About the .dat file: You can also drop here the .dat historical file “histdata_20200203172443.dat” (from the HMI USB key) to view its contents or also convert it here in .csv file.

 

Note about where you store your historical data

See in HMI parameters settings > Storage locations..

• If you select [Local (FLASH)]:
  • Trigger bit LB60128 to generate a CSV file, which the HMI will save to the USB drive.
• If you select [USB flash disk]:
  • Set up a button linked to bit LB60124. This bit signals to the HMI that the USB drive is about to be removed. It’s important to trigger it before unplugging the drive: without this step, a USB power loss during removal could result in file corruption or data loss.