empuron HIS - Historical Information System With the Database-Solution empuron HIS (Historical Information System) empuron provides a scalable database in the terabyte dimension. Time-series of large enterprises can be hold in access over several years online. The associated long-term archives allows an extension of the archive periods for time series on the entire life of the PV plant. * Historical Information System for 15-, 30- und 60-minutes- time series * Short-cyclical time series(<15 min) and long-cyclical time series(> 60 min) * Spontaneous values recording * Messages und status information Dimensioning (as example of a customer installation): * 350.000 time series in 15-, 30- oder 60-minutes-Cycle * In total 1,2 Mio. Data objects (addresses) * Archive period in online access: freely definable (e. g.: 2 to 5 years) * Long-term-archive for variable periods (up to 20 years or more) * Based on ORACLE 10g (alternative „EnterpriseDB“) Strategies for long-term data storage: * Long-term data storage manual or automatic (e.g. in monthly cycle) * Formats of the long-term data storage are based on ASCII or XML