Archiving

The zenon Archive Server records process data permanently and archives it – without any limitation. An archive can contain as many and type-independent variables (binary, analog, string) as desired.

zenon provides three archive types:

• Spontaneous: On each value change of a variable the changed value is recorded. Unnecessary entries caused by fluttering values can be avoided through a hysteresis (read more in Chapter “Communication”).
• Cyclic: Cyclically records values of an archive. The cycle time can be a minimum of 1 second.
• Event driven: At the positive edge of a trigger bit all values of an archive are recorded.

Time stamping in milliseconds

Each data set that is recorded in an archive contains in addition to the variable value, a time stamp in milliseconds and the variable status. This way the data can be historically classified and analyzed at any time. Internally zenon generally works with an accuracy of one millisecond.

You will find more information on the zenon status processing here.  

You will find more information on the zenon Archive Server here.