130-28176 Parallax Inc, 130-28176 Datasheet - Page 250

• Manufacturer Part Number: 130-28176
• Description: KIT PARTS PROCESS CONTROL
• Manufacturer: Parallax Inc

Specifications of 130-28176

• Accessory Type: Education Kit
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Board of Education Full Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

If all disturbances to the process remained constant, the temperature would stay at the
setpoint when the right percentage of drive was applied. We also saw that as conditions
changed, so did the measurement. Chapter 8 will investigate controls that take an
appropriate amount of action based on an evaluation of the measurement. Proportional,
Integral, and Derivative control theory can be employed to maximize the effectiveness of
the control system.
SOLUTIONS TO CHAPTER 7 CHALLENGES
Challenge 7-1 Solution
Part A:
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In the Initialization section of your program, comment out
then set the temperature setpoint in hundredths.
'GOSUB ReadSP_Span
SetPoint = 10150
Also in the Initialization section, set the values for
V_Offset
V_Span
In the main
'
Add a subroutine to control the fan.
Drive_Fan:
Add a subroutine call in the
GOSUB Drive_Fan
IF TempF > (SetPoint + 300) THEN
ELSE
ENDIF
RETURN
LOW FAN
GOSUB ReadSP_Controls
HIGH Fan
=
=
DO...LOOP
50
70
, comment out
DO...LOOP
' Read StampPlot for ADC
GOSUB ReadSP_Controls
' Check fan state for setpoint +3F
' Above – Fan on
' Below - Heat off
:
V_Offset and V_Span
GOSUB READSP_Span
:
,