Chapter 8 Logic Instructions 
8-321 
 
Auto Tuning Area PID Control Area
PID_MODE=1
PID_MODE=0
 
d.  The experimental result of using the parameters which have been tuned to control the 
temperature is shown below.   
 
 
e.  As the diagam above shows, after the parameters are tuned automatically, users can 
get a good temperature control result. It only takes about twenty minutes to control the 
temperature. When the target temperature changes from 80°C to100°C, the result is 
as below