WATCH-DOG TIMER CIRCUIT

A watch-dog timer monitor for the control system of a power plant including a pulse monitor which measures the length of time between successive control pulses from an output port of a computer. In the event that any control pulses exceeds the preselected time interval, the pulse monitor sends a dis...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	THEODORE S. MALINOWSKI, ANDREW E. TAYLOR
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CALCULATING COMPUTING CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING COUNTING ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY FUNCTIONAL ELEMENTS OF SUCH SYSTEMS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY REGULATING
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Beschreibung
Zusammenfassung:	A watch-dog timer monitor for the control system of a power plant including a pulse monitor which measures the length of time between successive control pulses from an output port of a computer. In the event that any control pulses exceeds the preselected time interval, the pulse monitor sends a disable signal through a latch to the buffers in the path of the control signals. The buffers instantaneously transition to a blocked condition preventing any subsequent control pulses from reaching the control system of the power plant. A reset button is toggled to reset an initializer which restarts the program in the computer. A start-up delay is also provided to insure that no spurious control pulses reach the control system of the power plant during a warm-up period when the digital logic circuits are settling out.