Introduction
SIMATIC Process Historian is a central logging system for storing process data such as process values and alarms. The Process Historian uses the Microsoft SQL Server 2014 64 Bit and logs historical data originating from a Runtime Professional.
Services
Process Historian employs four services for processing, storing and backing up data:
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SIMATIC Process Historian Server
This service implements all functions the server needs to process and store data.
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Process Historian Maintenance Service
This service implements all functions that are necessary to maintain the Process Historian database. Process Historian Maintenance Service handles tasks such as starting mirroring, mirror monitoring, restore functions, maintenance of the transaction log, etc.
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Process Historian Redundancy Service
This service implements functions that are necessary for data exchange between two redundant server systems.
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Process Historian Discovery Service
This service supports the search for connected Process Historian systems. The Discovery Service is essential for the functionality of the Process Historian.
Working with the Process Historian
The Process Historian is not installed with the TIA Portal; it must be purchased separately.
You can find more information on the license and technical data here: