Consider the following statements regarding a PID controller :1. The error is multiplied by a negative (for reverse action) proportional constant P, and added to the current output2. The error is integrated (averaged) over a period of time, and then divided by a constant I, and added to the current control output3. The rate of change of the error is calculated with respect to time, multiplied by another constant D, and added to the outputWhich of the above statements are correct ?

Consider the following statements regarding a PID controller :1. The e

1.	Consider the following statements regarding a PID controller :1. The error is multiplied by a negative (for reverse action) proportional constant P, and added to the current output2. The error is integrated (averaged) over a period of time, and then divided by a constant I, and added to the current control output3. The rate of change of the error is calculated with respect to time, multiplied by another constant D, and added to the outputWhich of the above statements are correct ?
A.	1, 2 and 3
B.	1 and 3 only
C.	1 and 2 only
D.	2 and 3 only
Answer» B. 1 and 3 only

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