10.4.4.2 Process Historian (PH)
Introduction
The Process Historian (PH) is used to archive process values, messages, and batch data from
the process control system SIMATIC PCS 7 V8.2.
The process values and messages managed in the PH database can be displayed on OS
clients and OS single stations clearly and graphically (with WinCC Alarm or WinCC Trend
Control). Data selection is supported by integrated filter functions. Messages and process
values can be displayed both in tabular form as well as graphically. The saved data is divided
into segments for processing and managing very large amounts of data.
The following picture shows an example of the segmenting setting in the PH:
The MS SQL server is used for the data archiving. The saved archive segments can be saved
as a backup file on a hard disk and then deleted (backup/restore). This prevents the memory
capacity of the data base hard disk from becoming completely full.
The PH does not need a connection to the plant bus. It can be connected to the OS and Batch
Servers of the SIMATIC PCS 7 plant via terminal bus, for example, using the integrated network
connection (on-board Ethernet RJ45 port) of the server.
The PH is suitable as long-term data storage for PCS 7 projects. You can swap out the data
from multiple projects/multiprojects to a PH.
Configuring OS functions
10.4 Archiving
Compendium Part A - Configuration Guidelines (V8.2)
260 Configuration Manual, 08/2016, A5E38166869-AA
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