Answer / manan2347

Because of the scan time.
the scan time of DCS is generally of 100ms to 1 sec. where scan time for PLC ia 10ms.

we want quick action in case of any emergency for that we are using PLC in ESD system.

Answer / ajaya behera

PLC scan time is 0.1ms to 10ms

1. How can leveltrol be installed in steam drum for measuring the level of steam drum?

1 Answers   Fischer,

---

What is scale factor of proximitor & unit of the viabration.

2 Answers   Sabic,

---

whats the diff b/w zero pressure and obsolute pressure

4 Answers  

---

Anybody know how to create a ladder programme for power switch in TV remote without using counter... ie TV can be turn on and turn off using single push button switch... on pressing the switch first time TV turn on and hold the on state till i press the switch again, and after TV turn off.

2 Answers  

---

which type signal in & out in dcs

4 Answers  

---

---

Why DP level transmitter preferred for closed vessels and Radar level transmitter for open tanks??

2 Answers  

---

Please explain the difference between instrument range and calibration range in terms of pressure transmitter? line design pressure: 93 bar operating pressure : 82 bar press Transmitter Range? calibration range ?

3 Answers   L&T,

---

how to measure the output of RTD given the general formula of  rtd.  

2 Answers  

---

micromotion flow meter used for

3 Answers   Reliance,

---

Hello Friends do you know this answer of this Question? Which color you would use when there is Somthing not correct or need to change In P&ID? i mean color that use for highlight that need to update in P&ID. Yellow Highlighter ? Red color ? Blue Color ? Appreciate for your answer. Thanks Blue Color

2 Answers  

---

how to check electrical health of vibration probe?

1 Answers  

---

why use 50% lel methane gas concentration for gas detector calibration instead of 60% lel gas concentration whereas the hi alarm set at 60% lel.

0 Answers   ONGC,

---