초록 ▼

The present invention provides a sequencing control strategy for environmental system controllers that takes better advantage of the capabilities of the system elements to enhance performance and reduce operating costs. A state machine controller is implemented by employing digital technology which

The present invention provides a sequencing control strategy for environmental system controllers that takes better advantage of the capabilities of the system elements to enhance performance and reduce operating costs. A state machine controller is implemented by employing digital technology which enables greater accuracy in monitoring system performance and performing diagnostics. This control modality also provides greater tolerance of faults by permitting automatic reconfiguration of the control strategy so as to be independent of malfunctioning components.

대표청구항 ▼

[ We claim:] [1.]1. An apparatus for operating a system which regulates environmental conditions in a building, the system having sensors for sensing the environmental conditions and having system elements for altering the environmental conditions, the apparatus comprising:a state machine controller

[ We claim:] [1.]1. An apparatus for operating a system which regulates environmental conditions in a building, the system having sensors for sensing the environmental conditions and having system elements for altering the environmental conditions, the apparatus comprising:a state machine controller having operational states comprising a plurality of automatic states in which the system elements are operated to alter the environmental conditions in response to the sensors and a plurality of command states in which operating parameters of the system are predefined, the state machine controller including a memory which contains data defining conditions for transition between the operational states wherein the state machine controller changes from one operational state to another in response to occurrence of conditions defined by the data; anda diagnostic element for producing information regarding performance of the system wherein the state machine controller enables the diagnostic element only when the state machine controller is operating in one of the automatic states.