Answer / abhishek

PLC is programmable logic controller. It has got wide
application like controlling a drive, motor or any other
batch process. PLC's have got capacity to handle less
number of input.
DCS is distributed control system. It has got application
where there are large number of inputs/outputs. Used for
large process handling.
SCADAA is supervisory control and data acqusition. SCADA
System usually consists of the following subsystems:
PLC, HMI,RTU.

Answer / anisha

PLC and DCS are used based on the application such as where
programmable controlling is required. It has a controller in
it with inbuilt communication protocols. PLC is used in
small scale controlling application inorder to automate it
whereas DCS is used for controlling a large scale automated
industries. whereas SCADA i.e Supervisiory Control And Data
Acquisition. It is used for interfacing Purpose and
supervisiory.

Answer / apoorva landge

And also DCS has a great storage capacity( memory) as compare to PLC and PLC has the best programming system.Therefore in most of the industries DCS and PLC is interfaced to get better results.. SCADA on the other hand is used when the control room is far away from the field. it is used to communicate at a long distance and on big scales

Difference HAZOP and HIRA

1 Answers  

---

What is DeltaV?

2 Answers  

---

State some of balance principle’ advantages?

0 Answers  

---

Why we are using thrust bearing at turbine side?

3 Answers   Edac,

---

tell how to calibrate a magnetic flow tx, vortex flow tx,dp flow tx,nozzle flow tx and venturi flow tx?

2 Answers   TATA,

---

What is the use of GMV in turbine?

0 Answers   Hamsco, Maruti Suzuki,

---

State bernoulli’s application.

0 Answers  

---

1. what is 3 point calibration & 5 point calibration? 2. If we use hart communicator to set the LRV & URV of a smart transmitter, did we calibrate the transmitter? why? 3. Make a complet list if meterials needed to properly connect a pressure gauge to a steam pipe using 1/2 inch stainless steel tubing. The gauge connections is 1/2 inch NPT-M and the steam pipe tap has a 1/2 inch female coupling, compression fittings are use. 4. What are the tools in loop checking? 5. What would the ISA symbol of a square root extractor look like? 6. What would you do to completely prepare for the configuration? 7. What safety measures must you undertake when doing configuration? 8. what are the two most commonly use programming languages used when we configure a PLC? 9. What would you do if you accidentally skipped a step in the configuration procedure? 10. How would you know if the configuration were sucessful? 11. Name at least 3 selections available when we configure the burnout protection of a controller?

3 Answers   EI Electrotechnical Institute,

---

How we select the range of level transmitter in closed vessel ?

4 Answers   Rosemount,

---

what are the standards used for earthing instruments in the field?

1 Answers  

---

what is the difference between active & reactive power?

0 Answers  

---

why we are using 4-20ma why cant we use 4-40ma

3 Answers  

---