Answer / nilesh

Question not clear.

1.PLC has its own controller which execute the
program.Before every program run PLC read the input and
after program execution generate output accordingly.
2.If PLC I/O need to be control from operator station (
DCS/SCADA) then PLC need to be connected to OS through
serial link/Ethernet

Answer / kawa

Yes of course we can either through its own HMI or through
seiral liks with some other control system (DCS).

Answer / ashish namdev

Operation station system no have any program (programming built in Engg. Station Only which is a server also)

but operating station system is connected with same network of plc/Dcs through Ethernet or other.

than that station has a SCADA software which is connect it to server system station through IP protocol.

 than we can access or give command through Operating station.



Ashish Nmadev
Sr. Engg In Jaypee thermal power plant, Bina(MP)   

I want to know if flowrate increases in 16' pipe line what will happen to upstream pressure and why?

1 Answers  

---

What is the difference between working pressure and calibration pressure of a control valve

0 Answers  

---

If a warning lamp will operate with the ground circuit is bypassed with a jumper wire to ground, what should you check?

0 Answers  

---

what is meant by Hydroelectric powerplant?

0 Answers  

---

A pressure transmitter with a range of 0-100 bar.The accuracy of the instrument is 1% of upper range value? The pressure indicating transmitter is showing the system pressure is 50 bar. b. When you include the error, what is the minimum possible pressure in our fuel gas system? i. 49.5 bar ii. 49 bar iii. 1 bar iv. 0.5 bar We want to change the filter cartridge. We must depressure the fuel gas system. c. After we depressure the system in preparation for maintenance, the transmitter displays a pressure of +0.1 bar. At this time, what is the possible range of pressures in our fuel system? i. +0.099 to +0.101 bar ii. 0 to +0.2 bar iii. -0.1 to +0.3 bar iv. -0.9 to +1.1 bar

3 Answers  

---

HOW TO CALIBRATE A DRUM LEVEL TRANSMITTER

2 Answers  

---

If an Instrument has 550 ohm internal resistance and the cable used for that instrument is 0.5 ohm per meter resistance. If the voltage is 12volt.How much length cable can be used? Please tell me its Calculation formula.

5 Answers   MOL,

---

To calculate temperature, why we multiply 25 with mV?

2 Answers  

---

Which language of programing is popular? how can i learn it ?

0 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,

---

how can i communicate with non-national instruments device with pc via labVIEW8.2

3 Answers   Google, Mico, National Instruments,

---

what are the problem's will accure in dcs or plc hadware and what are the solution for it?

2 Answers  

---