Example that demonstrates the use of the PID controller
with hysteresis and off timer.
The example is identical to
Annex60.Controls.Continuous.Examples.PIDHysteresis,
except that the controller also has an off timer.
This timer keeps the control signal at y=0
for a period of minOffTime=1000 seconds.
This may be used to avoid short-cycling if the load is small
and the system has little heat capacity.
The figure below shows the control error
con.feeBac.y and the control signal
con.y.