SAMWONTECH
2nd Edition of TEMP2000_Series IM : July. 16. 2010 Page 40 / 87
◈ Example
What is the P BAND when Input Range High(RH)= 100.0℃, Input Range Low (RL)= -100.0℃,
Rate(P) = 10.0%, Over-Integral Prevent(ARW)= 200%?
Answer)
① Input Range = RH – RL = 100.0℃ - (-100.0℃) = 200.0 ℃
② Input Range x Rate(P) = 200.0℃ X 10.0% = 20.0℃
③ P BAND = ② x ARW = 20.0℃ x 200% = 40.0℃
4.2.1.4 Control Constant
▶ It is used to change control characteristic based on preset PID value after Auto Tuning.
▶ Control Constant is adjustable according to the control object and its characteristic.
☞ Control Constant < 1.0
It has quick response time but has higher haunting.
☞ Control Constant > 1.0
It has less overshoot but has slower response time.
Control Constant = 1.0
Control Constant < 1.0
Control Constant > 1.0
NPV
TIME
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