A method of operation for free process controls minicomputer systems failure

摘要

The data input system has a keyboard for process controls with multi-computer systems. It has data display terminals coupled to screen input units with the supply of control instructions effected by touching or marking selected positions on the screen. Each screen has two different and independent screen input units (SE,LG). The selected screen positions are supplied to all the computers (R1,R2) of the multi-computer system. The input of control instructions are only converted after comparing the screen positions of the two screen input wires.