Answer / ashish gupta

There are 3 different modes of a PLC processor.
1. Program mode - In this mode the processor will not
execute the output even if all the inputs are healthy.
2. Run Mode - Normal Operation Mode
3. Remote Run -

I don't know what happens in 3rd mode if anyone knows
please post the answer.

Answer / sushil jambhulkar

3)Remote run - PLC run as per HMI OR PC interfacing with
it.

Answer / narendra mishra

Remote run mode allow user to switch between run and program mode remotely.

Explain " FAIL SAFE " feature in temp. measurement.

1 Answers   Bapco Bahrain Petroleum Company,

---

What is force balance principle?

0 Answers  

---

In which principles tx ,pressure gauge,Temp gauge,control valve works?

0 Answers   Bajaj, Professional Instruments,

---

What for barriers are used in DCS & PLC systems?

2 Answers  

---

why use 4-20mA in the field of instrumentation?

8 Answers  

---

what is the difference between CPC and i/p converter

1 Answers   Siemens,

---

What is defferent betwen ESP &PCP PUMP .HOW IT IS WORK?

0 Answers   Jindal,

---

can i use capillary type dp transmitter converted to capillary type pressure transmitter. if i removed one side capillary tube its work correctly?

1 Answers  

---

I have observed in field instrumentation work... I remove the fuse of an analog transmitter then it shows 7.75 kg/sq cm (which is practically wrong value)in DCS and when put the fuse it shows 0 in dcs. Then cheach the field transmitter termination and found moister. clean that and then it shows 1.1 kg/ sq cm which is right value. Please describe the above phenomenon.

1 Answers  

---

What is hp & mp seperator .& what is its working principle ?

0 Answers   Chevron,

---

Emergency Shutdown Systems/ Plant Shutdown System.

0 Answers   CCIE,

---

What is the difference b/w EMF, voltage & potential difference?

1 Answers  

---