Answer / er.shah rahul

Basically,smart transmitters are used for sensing the
analog signal then,smart transmitter digitalized it & give
it range& adjustment.it corrects it by many factor.it is
used only in non hazardous area.this is continuous sensing.

apart from that,PROFIBUS DP is decentralised periphery
used in non-hazardous area & PROFIBUS PA is process
automation used in hazardous area.They is joined through
coupler.PLC Periodically receives data as a packet.

Answer / rathina

Basically trouble shooting point of view, multimeter if
enough to trouble shoot the SMART Transmitter. but Profibus
we need some kind of PLC loaded PC's

Answer / dibyendu das

PLC DCS
 Fast logic scan (approx. 10ms) is required to perform
motor or motion control.
 Control loops require deterministic scan execution.
perform motor or motion control at a speed of 100 to 500 ms
 Redundancy may not be cost justified.
 System redundancy is often required.
 System can be taken offline to make configuration.
 Online configuration changes often required changes.
 Analog Control: Simple PID only.
 Analog Control: Simple to advanced PID control up to
Advanced Process Control.
 Diagnostics to tell you when something is broken.
 Asset Management alerts you to what might break before
it does.

Answer / vikas dhiman

SMART Stands for Self-Monitoring, Analysis and Reporting Technology which is basically a technology and whereas Profibus DP/PA are transmission protocols. Like HART, Foundation Fieldbus etc.

what is mean by live zero and dead zero

3 Answers  

---

Explain the difference between mmwc and mmwg?

0 Answers  

---

How to change dcs card in online. (Dsc is maxdna)

3 Answers  

---

How does electro magnetic pump works ?

1 Answers   IGCAR,

---

how u calibrate pneumatic n motorized c/v?

0 Answers  

---

What is pressure,What is temperature,What is flow,What is level

4 Answers   Keltech, Petrofac,

---

I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.

0 Answers  

---

Which standard of hazardous area classification used in India?

1 Answers   Orchid,

---

What is voltage free(wet) and potential (dry) contact?

2 Answers  

---

why we require Differential pressure?Why we use Orifice Plate?

3 Answers  

---

how can we caliberate interface level troll

2 Answers   Grasim, IOCL, KOC, Sankyu,

---

What is a flow meter?

2 Answers  

---