122-28176 Parallax Inc, 122-28176 Datasheet - Page 247

• Manufacturer Part Number: 122-28176
• Description: GUIDE STUDENT PROCESS CONTROL
• Manufacturer: Parallax Inc

Specifications of 122-28176

• Accessory Type: Manual
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Propeller Education (PE) Kit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant

Chapter 7: Closed Loop Process Control · Page 237
above the limits would be insufficient to raise the egg's temperature appreciably. If this
were an actual incubator, the response of the system would be much slower. Consider
what would happen if the temperature began to drop due to a disturbance, such as
opening the incubator for a short period of time. As the incubator's air temperature
dropped, the heat stored in the eggs would be transferred to the air, helping to stabilize
the temperature. The greater the mass, the longer the time constant of the system.
Figure 7-10 Differential-Gap Control
Program Discussion
While most of the code should be fairly easy to follow, the ability to add controls to
StampPlot from the BASIC Stamp is something new. Note that the code begins by
deleting the named control we are about to create. This is done to ensure a duplicate is
not created if you reset the BASIC Stamp and the code is run again.
DEBUG CR, "!O lblBand.Delete",CR
' Delete control if exists