what is the difference between plc & DCS?
- 5 Answers
- 7760 Views
- Cheminova, NGIL, Siemens, I also Faced
- E-Mail Answers
Answer Posted / deepak
These are the major differences
1. scanning time of a PLC is depend upon the length and size of the program. In DCS scanning time is constant.
2. DCS can handle large number of IOs
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
can any send me a forbes marshall dtron 316 manual
Why grounding is necessary? Give example with diagram.
when a magnet is heated?
diff between neutral ,ground,phase , earthing and shielding?
What are the types of valves?
why we should maintain neutral earth voltage below 1V while calibration? why cant it be 1.2V or 2V
Can I route 110 VDC and 24 VDC in a same Duct for our Interposing relay cabinet? IF yes or NO Please provide me IEEE Std. for the same. Please i required it on Urgent basis, i need to design IRP Cabinets and we have MCC 110VDC and Our Coil side is 24VDC, Please help as soon as possible.
Which products are available in the Mass Systemswitch and System Manager AC range?
anybody having Qatar Petroleum questions for instrument Technician offshore ....please send me
PLEASE PROVIDE SAMPLES OF CHEVRON SKILL TESTS
Make Heater Process Logic.
A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.
give me all the details about the interview and which type of question being asked
What are different types of valves?
what is a vortex flow meter,mass flow meter and electromagnetic flow meter.particular use of this.means in which condition particular meter is used.
