The Process Historian is used for long-term archiving of the following data from the SIMATIC PCS 7 process control system:

• OS archive data (process values and messages)
• Batch data

The process values and messages exported from the OS archives, as well as the batch data from SIMATIC BATCH are managed by the Process Historian in a central database. They can be visualized on OS clients or OS single stations either directly or with the support of the information server.