Input-Output-Process Demo

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Presentation transcript:

Input-Output-Process Demo Central Heating System 24/02/2019

User sets the desired temperature. Input Processor Preset Value: User sets the desired temperature. 24/02/2019

Input - Measurement Processor The monitoring of physical variables without the microprocessor taking action. Temperature readings Temperature Sensor Processor 24/02/2019

Compares current temperature with preset value Processing Processor Compares current temperature with preset value 24/02/2019

If current temperature < preset value When a microprocessor takes action depending on sensor readings. Processing Control Too cold Signal Heater On Processor If current temperature < preset value 24/02/2019

Output Too cold Heater On 24/02/2019

If current temperature > preset value When a microprocessor takes action depending on sensor readings. Processing Control Too Hot Processor If current temperature > preset value Signal Heater Off 24/02/2019

The process is continuous and so repeats. Output Too Hot Heater Off 24/02/2019 The process is continuous and so repeats.

Notes: Input: Processing: Output: User sets the desired preset value. Sensors sending readings. Processing: Microprocessor comparing the preset value with the current sensor readings. If higher / lower then microprocessor decides to switch a device on / off. Output: Devices actually being switched on or off. Sensors do not compare or decide to switch anything on or off, they only send current readings. 24/02/2019