| DISTRIBUTED CONTROL SYSTEM |
| PAPER NO. 2 |
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| PUT ON: Dec, 2001 |
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IC - 418 DISTRIBUTED CONTROL SYSTEM (B.Tech 8th Semester, 2092) Time : 3 Hours Maximum Marks : 60 NOTE:- This paper consist of Three Sections. Section A is compulsory. Do any Four questions from Section B and any two questions from Section C Section-A Marks : 20 1(a) Define digital control system. (b) What forms of different data links are used in adistributed control system ? (c) Given :- A memory of, tWC (write cycle time) = 200 n sec t RC (Read cycle time) = 200 n sec tA (Access time) = 100 n sec tOHA (data hold time) = 50 n sec Find the maximum rate at which (a) data can be stored (b) data can be read . (d) What is meant by knowledge-based control ? (e) Briefly explain analog control ? (f) Define supervisory control ? (g) Define expert system ? (h) What is PLC ? Draw a typical PLC architecture ? (i) List several of the most popviar peri-pherals normally associated with process control digital computers ? (j) What is meant by Direct - digital control ? Section-B Marks:5 Each 2. Draw a neat sketch of centralized distributed computer control network and explain its various blocks ? 3. Mention the advantages and disadvantages of digital control over analog control ? 4. What are local control units (LCU ) ? Explain. 5. What is meant by statistical process control ? Explain. 6. Explain clearly the distributed control system (DCS) integration with computers ? Section-C Marks : 10 Each 7. Write short notes on :- (i) Semiconductor memory (ii) Auxiliary memory 8. Mention the control console equipments used in distributed control system (DCS) ? Explain any two of them in detail . 9. Explain in detail, the I/O hardwae stations ? |