Answer / anusree

i) Cyclic Execution
ii) Event driven Execution

Answer / shiva

There are two main types of PLC execution modes.
1) Cyclic execution mode.
2) Intrrupt and clock driven execution modes.

Answer / abdus sattar mollah

1.Continuos.
2.Periodic.
3.Eventual.

Answer / vijayaprakash

1) cold execution
2)hot execution

without a positionar can a control valve operate? give the difference of operating with positionar and without positionar?

5 Answers   IOCL,

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what is INSTRUMENTATION ? specify..

7 Answers   Reddy Labs,

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what will happen if transmitter wire get shoted?

2 Answers   Sabic,

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how to check electrical health of vibration probe?

1 Answers  

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principle of automatic votage regulator

0 Answers   Bhel,

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Which softwere is required to communicate the S7-300 processor

4 Answers  

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HELLO FRENDS ,, I M IN THE MIDST OF TROUBLE .. JUST LITTLE HELP ME... SUPPOSE ,, I HAVE A CLOSE VESSELE TANK ( HEXANE MEDIA ) ,, I M USING ROSEMOUNT 2051 DPT FOR LEVEL APPLICATION .. ITS CALIBRATE RANGE IS.. . 0 TO 950 MMH20 ..I DID CALIBRATED DPT WITHOUT REMOVING IMPULSE LINE OF HIGH AND LOW TAPPING.. & WITHOUT DISTURB 3 WAY MANIFOLD..!!! BUT ,,, DURING CALIBRATION I SELECT RANGE BY HART LRV IS 900 MMH20 & URV IS 1300 MMH20 ,, BUT ,TANK LEVEL SOMETIMES 100 % AT 1100 MMH20 , SOMETIMES 1300 MMH20 ..IN THIS CONDITION .. WHOLE LOOP FAILED ,, MAIN THING IS THAT ,, HOW TO CUSTOME RANGE SELECT ?? AND IF I USED RANGE OVER THE ORIGINAL CALIBRATE RANGE ,,,THEN WHAT ERROR WILL BE COME ??? HOW TO ZERO CALIBRATION OF DPT... HOW TO ZERO TRIM BY MANIFOLD ?? AND FOR TANK LEVEL PURPOSE ... WHICH UNIT I CAN USE ??? IS THERE ANY CALCULATION OR CALIBRATION .. IF YEH .. THEN PLZ JUST GIVE ME CALIBRATION STEPS FOR DPT.. THANKS YOURSSSSSSS

1 Answers   Torrent Pharma,

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what is loop folder?

1 Answers   Bapco Bahrain Petroleum Company, Hyundai,

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what is buoyancy law?

1 Answers  

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what's the minimum level required of SIL (safety integrity level)to use fire and gas system?

2 Answers   L&T,

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What are the cable come out from the paddle type flow sensor.and how is further connections

1 Answers  

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Instrument QA/Qc what is the project quality plan?conduit inspection RFI. which documents attache with package?

0 Answers  

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