You are hereonline systems
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