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Hitachi

Process computers basically provide plant information to monitoring screens installed in central control room.
The computers collect a wide variety of plant-related information at all times, serving as an HMI (Human-Machine Interface) that saves labor and facilitates appropriate decision-making by operators.
PC-based hardware is developed in an open platform environment.

Functions and characteristics other than operations monitoring and guidance functions

Operations records, alarm records, log functions

Long-term electronic records, automated output, on-demand output using printer servers

Transient phenomena recording function

Collection and recording of plant data for transient phenomena for purposes of analysis

Operator request functions (operating limit functions)

Security management using IC cards for procedural changes in important parameters