CONTROL LOOPS OPEN LOOP -The corrective medium is applied with no feed back indicating the actual condition of the addressed function. -Example- Setting your furnace to run 50% of every hour with no thermostat sensing the temperature in your house. -The accompanying diagram illustrates the controller receiving information regarding the amount of corrective medium being applied, but does not sense the desired result. CLOSED LOOP -The corrective medium is applied based on the actual condition of the addressed function. -The accompanying diagram illustrates the controller controlling the corrective medium based on receiving information regarding the desired result. Corrective Medium Controller Desired Result Controller Corrective Medium Desired Result 4.32
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