Human-machine interface system for technical process, has operating and observing devices which cyclically fetch time and/or data information from central time server

摘要

The system includes a communication network (N), a central time server station (ZS), which can be addressed via the network, and at least one operating and observing device (P1,P2,P3) connected to the network. The operating and observing devices fetch time and/or data information from the central time server station via the communication network, preferably cyclically.