Hardware Reference
In-Depth Information
Figure 7-3.
An ON/OFF controller
Figure
7-4
shows a DEAD BAND controller using the same setup as the preceding graphs. The DEAD BAND
is formed by a high setpoint and a low setpoint. The advantage this provides over a basic ON/OFF is that the cycle
frequency is decreased to lower the amount of switching of the state either on or off. This is the average controller style
for HVAC systems, where turning on and off can lead to higher power consumption and increased mechanical fatigue.
Figure 7-4.
A DEAD BAND controller
