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The answer to this question is very factory-specific, here we offer two possible configurations:
Scenario 1 - 3 redundant systems
Currently, there are 3 independent (though interconnected) systems in <Our_company>, built using D2000 technology:
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All three D2000 instances run physically on three independent execution servers, which run the hypervisor for the virtual servers needed to run the D2000 system. Each D2000 instance has its own application server, which is redundant and runs physically on a different server, and individual users connect to these application servers. New installations and updates for D2000 are distributed to users via FTP updates from a special server. D2000 is a fully redundant system in terms of application, archive databases, and network optical connections.
Scenario
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2 - a 3-node SCADA and 2-node MES
Currently, there are 2 independent (though interconnected) systems in <Our_company>, built using D2000 technology:
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- In Cnf, you can go to the Object menu and select History. In the dialog window, set Modify time from/to appropriately and click Find. The list can be copied (Ctrl+C) as a CSV list.
Full list: see file ‘D2000 changes of objects in 2025.xlsx’
For each object, its default latest history is limited to the last 7 changes; this is configurable by a system parameterLogRecsLimit. So, currently, only the last 7 changes of all objects modified in 2025 can be obtained from the system. The reason is to keep the Configuration database within reasonable size limits.
For more info, see the documentation - Object modification history.