Shared interface for multiple controllers

Details Shared interface for multiple controllers Shared interface for multiple controllers

1992-06-02

1994-08-09

Smith, Jerry

Boots, shoes, and leggings

364463, 364132, 364138, 345115, G06F 1310, G06F 1520

Patent

active

053372298

ABSTRACT:
A control system for a balancing machine has a main computer with a keypad and monitor, an auxiliary computer for managing the balance measurement and correction functions and sharing the same keypad and monitor. Each computer controls the machine through a programmable logic controller (PLC). A video sharing circuit allows direct coupling of each computer to the monitor and includes a switching function under control of the main computer via the PLC to determine which computer will control the monitor display. A dedicated key command on the keypad controls the switching of the monitor control. Software in each computer responds to the dedicated key command for monitor control and also enables response to all other keypad commands by the computer which currently controls the monitor.

REFERENCES:
patent: 4032897 (1977-06-01), Pooley
patent: 4285240 (1981-08-01), Gold
patent: 4511965 (1985-04-01), Rajaram
patent: 4647928 (1987-03-01), Casey
patent: 4757441 (1988-07-01), Buckland et al.
patent: 4942391 (1990-07-01), Kikuta
patent: 4977510 (1990-12-01), Winzenz et al.

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