Application of Microcontrollers Labs Part I - Principles & The ... - ISL

Microcontroller Labs - Part I (V0.9p)
4. (3 pts) Modify the program in question 2 so that the pump energizes at 50 gallons and deenergizes
at 150 gallons.
Gallons var byte
POT var word
Loop:
HIGH 7:Pause 10
RCTIME 7,1,POT
Gallons = POT * 2 /53 MIN 1 'Scale for ~ 0-200 gallons.
Debug "Tank volume = ", DEC Gallons, CR
GOTO Loop
5. (1 pt) Question 4 uses a ______________________ process control method for level control.
6. (2 pts) Assume the pump can be driven at variable speeds based on duty cycle. Draw a
graph showing %Duty cycle vs. the volume of 50 gallons (highest flow rate) to 150 gallons
(fully off).
7. (1 pt) The pump would be driven at _____ % Duty cycle if the tank volume was 60 gallons.
8. (2 pts) Write code that will drive P10 (Green button's LED) continuously on the BS2 at 90%
duty cycle for 100 cycles.
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