Answer / kunal

first of all open the two nos screw than check interlock if
bypassed, than PULL the card.

so simple.

Answer / muzaffar

If the Card is redundant then there will be no problem to change the failure card. if it's non-redundant cards then please follow the Kunal instructions.

Answer / faiyaz ahmad

DCS card can change very easily because the DCS system would be redundant means each Nodes having a Stand by That is why if you want change DCS card you can when you will change the card another will come online by its self all are in automation system.

what is the responsibility of an instrument commissioning supervisor

0 Answers   Petrofac,

---

DCS marshilling Cabinet Power supply can be replace during plant running time?

1 Answers  

---

hi! i want to know about mpse exam.

0 Answers  

---

how u measure flow?orifice measurement?why all ft in square root?

1 Answers  

---

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.

0 Answers   MNC,

---

---

what is Micro-switch and where it is used......?

7 Answers  

---

How to calibrate the flow transmitter

0 Answers  

---

the 3 most common transmitter protocol being in refinery or qatar gas and aramco.

0 Answers   Shell,

---

What are the charecterstics of control valve.

2 Answers  

---

how to work MIL contol valve posistioner ?

0 Answers   ABB,

---

1 bar is equal to how many pound per square inch(psi)?

14 Answers   Essar,

---

What is PLC(programmable logic control)?

1 Answers  

---