A process can be modeled as a first-order plus dead time (FOPDT) transfer function: G(s) = K e-Ls Ts 1 2e-0.12s 0.02s+1 The process reaction rate is the gain divided by the time constant. Suppose a PID controller is to be designed using a suitable method from the table below: Controller type K Step response method T Frequency response method Ta T Ta P PI PID 1/(RL) 0.9/(RL) 1.2/(RL) 2L 0.5K L/0.3 0.45K T/1.2 0.5L 0.6K Tu/2 T/8 Calculate the proportional band of the PID controller. -Solution: