Some of the Interview questions for Control System Engineers - DCS (Distributed Control System )

Q) Definition of DCS?

A microprocessor based control and Data acquisition system consisting of number of modules operating over a network.

Q)Typical functions available in DCS

1 PID Control

2 Discrete control

3 Advanced control capability

4 Alarm management

5 Graphical and Schematic displays

6 Trending of real time and historic data

7 Communication between other device and subsystem

8 Data acquisition

9 Report generation

10 Data Historization

Q) Different type of PID function included in DCS?

PID Basics controller

PID Ratio

PID cascade

PID Bias

PID Differential gap

PID adaptive gain

PID non linear

Manual station

PID self tuning

External output tracking

Reset limiting

Q)Math functions included in DCS?

ADD

Subtract

Multiply

Division

Summation

Difference

Square root

Square

Absolute Value

Logarithm

Exponential

Polynomial

Q) Dynamic functions included in DCS?

Lead/Lag

Dead time

Velocity limit

Totalize

Q) Logic controls included in DCS?

And

OR

Exclusive OR

On/Off Delay

Inverter

Flip-Flop

Pulse

Nand

Nor