Resume Genesis OPC Data Acquisition in Genesis 3.1

When a Genesis OPC Data Acqusition is stopped (see here for details), the OPC Genesis project is still alive and can be restarted.

• Click on the icon 'Data Acquisition and Storage' in the left pane of Genesis 3.1 main window.
  
  
  
  
• Click on the Button 'Resume Data Acquisition' of the Ribbon Category 'Data Acquisition'
  
  
  
  

Important Note As the Genesis Project is still active after a Data Acqusition Stop, on resuming the Data Acquistion, the acquisition engine makes its best to reduce the Acquisition Gap that occurs due to acquisition stop.

Looking at an exemple will make the behaviour easy to understand ...



In that project, the acquisition rate was 100 ms (as seen in the column labeled 'Acquisiration Rate'). At the data Id 305171 (that is, 2018/09/29 17:09:27.973), the OPC data acquisition was stopped and Genesis 3.1 recorded the last data acquired. Later, the OPC Data acquisition was resumed. At first, Genesis 3.1 computed the time gap between the current time and the expected time for the next data (that is, data Id 305172). This gap was equal to 242 seconds. From then, the acquisition engine increased the acquisition rate at the maximim speed to reduce the gap.



Finally, around 90 seconds later, the gap was reduced to a value less than the acquisition rate and the normal rate of data acquisition was used for the next acquisition.

See Also
Start Data Acquisition
Stop Data Acquisition
Acquisition Data Matrix