Applies To:
  • CitectSCADA 2.x, 3.x, 4.x, 5.x

History files are sometimes not created, even though the device is set up as a History device. 

History files are only created and rolled over at the appropriate time if the device is opened in Logging mode. Generally, the system takes care of which mode to open a device in, but there are some instances where the system will chose an inappropriate open mode. To rectify this, from 3.4/4.2 Service Pack E and 5.1, the system will now always open a History device in Logging mode.

A new parameter has been added which will override this. By setting the following parameter to 0, the system will revert to the old behaviour.