Historic objects are modules responsible for storing data from an application on a database. They allow storing process data for future analysis. Users can create as many Historic files as needed, each one containing several Tags or expressions. Each Historic can create or use an independent table from a database, and its storage can be defined by time or by event. The CacheSize property define the number of records sent at a time to a database. The DBServer property defines a Database Server used by a Historic.

Historic object

A Historic object is indicated for billing data, power meter collecting, and other processes involving values that cannot be compressed.