Honeywell International Inc.

Honeywell G.m.b.h.

Richard M Solosky

Robert D Juntunen

James I Bartels

Scott Paul O'Leary

Paul B Patton

A control system for controlling an operating system stores a system parameter such as an ultimate pressure value, for an operating system. The control system allows operation of the operating system only after an initial value of the system parameter has been loaded. In one embodiment, a data generator element intended normally to specify a set point for the operating system, is used to provide the system parameter value as well. The control system provides a grace period after a value of the system parameter has been entered during which the system parameter value can be changed. After the grace period ends, the system parameter value cannot be changed by the operating system manager under normal circumstances. A light source is flashed in various patterns to indicate to personnel which of several different actions available to the control system are occurring.

Control system apparatus for loading a value of a system parameter and preventing change thereto after a period of time

A power controller has upstream and downstream switches in series connection to provide redundant switching for power supplied from a power source to a load. A switch operating system closes the switch closer to the load first (downstream) and then the switch closer to the source (upstream). The operating system conditions closing the downstream switch on absence of power voltage on an upstream power terminal of the downstream switch. A preferred embodiment of the operating system performs a number of real time status checks during the connection process to assure that power voltage is properly absent and present at switch terminals during the stages of the connection process. This operating system guards against supplying power to the load if either the upstream or downstream switch's pair of contacts are welded at the time the connection process starts.

Power switching system

A modulated burner combustion system that prevents the use of components that were originally not commissioned for use in the system. The present invention uses actuators that contain unique stored identification numbers. When the system is initially configured or commissioned, the unique identification numbers of the actuators are stored in nonvolatile memory in a fuel/air controller. When the system is brought on line, the fuel/air controller microprocessor initially sends false IDs to the actuator together with test control signals to determine if the actuator operates in response to the false identification numbers. If the actuator does operate in response to the false identification numbers, that is an indication that the system has been tampered with and the system is, consequently, shut down. Subsequently, the true identification numbers are transmitted to the actuators with test control signals. The fuel/air controller microprocessor determines if the actuators move properly in response to the test control signals. If they do not move or do not move properly, that is an indication that an actuator is present in the system that was not originally commissioned with the system, or that an actuator is operating improperly. In that case, the system is also shut down. The feedback mechanism of the present invention eliminates the need for expensive safety software and expensive microprocessors in the actuators.

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Minnetonka, MN, United States of America

Richard M Solosky