Selected datapoints store their values periodically. There are two types of history data:
- long term history: saved permanently to text files or SQL database, for long-term analysis
- short term history: several days back, faster sampling, for trending, tuning loops, and problem analysis

For each datapoint, the sampling type and frequency can be defined. The sampled values can be displayed as a graph and exported to .CSV or .XLS files. The export may also follow on a periodical basis automatically.
The SQL database is open for 3rd party programs so that the RcWare Vision station can be used as a data integrator, providing actual values e.g. over an OPC server, and history readouts over a SQL database or/and automatic export files.
Graph configuration data can be defined and saved as a template accessible either from the Graph menu or directly from the plant graphics.