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online systems

as an example for online available informations you can see here a screenshot right out of the display of a plc, that controls a CNG-fork truck-filling station - updated every 10 minutes...

...of course all values of a plc can be transferred to a server and be queried by a service-technician

Recording and logging of values like energy consumption, production-values or
delivery quantities becomes accessable for the technicians

Logfiles, alarm histories and so on are also included

Making reports at the server for different groups of users is also a possibility of the system