PLC SCADA DCS Interview Questions and Answers 2

PLC SCADA DCS Interview Questions and Answers 2

PLC Interview
Questions and Answers

SCADA Interview
Questions and Answers

DCS Interview
Questions and Answers

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freasher in the field of Automation and those are looking for job and preparing
for interviews. It is difficult to find the PLC interview questions and answers
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So here we go.

Question: What are the basic functions of computer aided process control
system?
Answer:
                                                   
i.    
Measurement and
data aquasition
                                                 
ii.    
Data Conversion
with scaling and Checking.
                                                
iii.    
Visual Display
                                                
iv.    
Comparing with
Limits and alarm raising
                                                  
v.    
Data Logging and
computation
                                                
vi.    
Control action
                                              
vii.    
Rrecording and
monitoring of events , sequence and trends
                                   
Question: Define SCADA.
Answer:
Supervisory Control
and Data Acquisition (SCADA) system is computerised hardware and software based
project that provides a single integrated view of all control and information
resources, enable engineers, supervisors, operators to view and interact with
the working of an entire operation through graphical representation of their
product process.
Question:List the functionalities of SCADA.
a. Access control

b. MMI

c. Trending

d. Alarm handling

e. Automation

f. Logging/Archiving and report generation.

Question: Mention some of the
application areas of SCADA
Answer: 
Industrial process: chemical plants, power generation and
distribution, Metallurgy etc and nuclear process: reactors, nuclear waste etc.

Question: List the potential benefits of SCADA.
Answer:
a. Educed site visits and callouts

b. Predictive maintenance which allows proactive rather than
reactive planning

c. The ability to view and adjust set points remotely

d. Reliability and robustness

e. Maximize productivity

f. Improve product quality

g. Reduce your operating and maintenance costs

h. Integrate with your business systems

i. Preserve your capital investment
Question: What is CIMPLICITY?
Answer:
CIMPLICITY is a
SCADA package. It is based on a client server architecture consisting of
servers and viewers. Servers are responsible for the collection and
distribution of data. Viewers connect into servers and have full access to the
collected data for viewing and control actions.

Question: What is SCADA? Give any
four editors available in SCADA package .
Answer:
Supervisory Control
and Data Acquisition (SCADA) system is computerised hardware and software based
project that provides a single integrated view of all control and information
resources, enable engineers, supervisors, operators to view and interact with
the working of an entire operation through graphical representation of their
product process.

Four editors:

a. Inkscape SAGE – SCADA Animation Graphic Editor

b. Generic Logic

c. TRACE MODE

d. UCanCode
Question:What is the significance of DCS?
Answer:
DCS is used for
interfacing and computing functions and also provides the means of
communication between the other devices. It consists of local control unit, low
level interface, high level interface, shared communication facility Etc
Question: Mention any four advantages of DCS
Answer:
a. More reliable

b. Good scalability and expandability

c. Installation Cost is lower than centralized system which
performs the same function.

d. Excellent maintainability.
Question:What is LCU?
Answer:
Local control unit
is the small collection of hard ware in the system that can do closed loop
control. Local control unit interfaces directly to the process

What is the need
can be satisfied in designing an industrial grade LCU?

Flexibility of
changing the control configuration Ability to use the controller without being
a computer expert. Ability to bypass the controller in case it fails. So that
the process still can becontrolled manually. Ability of the LCU to communicate
with other LCUs and other elements in system

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