DEPARTMENT OF MECHATRONICS ENGINEERING
Laboratory Manual
MECHATRONICS ENGINEERING LAB V (MCT 4239)
INDUSTRIAL AUTOMATION
EXPERIMENT 4
Control Loop
* * 4 : CONTROL LOOP EXPERIMENTS
The following list of experiments are closed loop experiments that are specified for tuning and P,I, D studies.
* Experiment 4.1: EFFECT OF P, I and D on process Plant
Objectives:
- To familiarize with the Tuning Panel of the DCS
- To capture Trending on the DCS
- To understand the effect of Proportional (P), Integral (I) and Derivative (D) to the setpoint change or load disturbance
* * Procedures: *
1) Set the Setpoint on the DCS to 50%. Record the PV value it should be near the 50% mark. Now set the DCS Controller faceplate to ‘Auto’ and let it stabilize.Make sure the discharge valve on plant is fully opened.
2) Set P = 30 , I = 3, D = 3 as initial values of PID.
3) When stabilize Change the P Value , while maintaining the I and D Values. Note the responses by disturbing the setpoint up or down about 5%.
4) Save the trend values at the DCS. Comment on the effect of P to a disturbance.
5) Stabilize the Process at the 50 % mark and leave it at ‘Automatic’ control. Now change the I values , while maintaining the P and D Values. Note the responses by disturbing the setpoint up or down about 5
6) Save the trend values at the DCS. Comment on the effect of I to a disturbance.
7) Stabilize the Process at the 50 % mark and leave it at ‘Automatic’ control. Now change the d values , while maintaining the P and i Values. Note the responses by disturbing the setpoint up or down about 5%.
8) Save the trend values at the DCS. Comment on the effect of D to a disturbance . Use D=1 , D=10
9) Record the Results in the table 7 below
TABLE 7: Effects of P, I and D action on the