Answer / uncontrol

Following are the mode of control. Ratio Control, PID
Control, PI Control, ON/OFF Control, Cascade Control,
Override Control, Feedback Control, Feed Froward Control.
These control are can be set in to MAN and AUTO Mode, If
this in MANUAL the mode of control is disable, If this is in
AUTO the mode of control is enable.

Answer / omak

In automatic controller there are two modes available to control the process. One is called Automatic mode, it will control the process automatically by comparing the feedback input with the set point. The another method called Manual mode, in this mode the operater check the measured input from the field and give the command manually for the final control element.

what is the T/C & RTD mesuremaint?

3 Answers  

---

Why we not use 2-20Ma or 1-20Ma

5 Answers  

---

Exothermic reaction./ endothermic reaction

0 Answers   CCIE,

---

what is ABB DCS SYSTEM?

2 Answers   OMV,

---

How to work togather like sov,limit switch,proxy switch and booster in xv

0 Answers  

---

how to calibrate motorized operated valve?

1 Answers   Bilt, Jubilant, SRF,

---

What are the maximum packet size of: a) HART b) Profibus DP c)Profibus PA d) DeviceNet e) Foundation Fieldbus

0 Answers   EIT,

---

what master plc do?

2 Answers   ISRO, Yokogawa,

---

difference between transducer and converter in instrumentation

4 Answers  

---

1. what is 3 point calibration & 5 point calibration? 2. If we use hart communicator to set the LRV & URV of a smart transmitter, did we calibrate the transmitter? why? 3. Make a complet list if meterials needed to properly connect a pressure gauge to a steam pipe using 1/2 inch stainless steel tubing. The gauge connections is 1/2 inch NPT-M and the steam pipe tap has a 1/2 inch female coupling, compression fittings are use. 4. What are the tools in loop checking? 5. What would the ISA symbol of a square root extractor look like? 6. What would you do to completely prepare for the configuration? 7. What safety measures must you undertake when doing configuration? 8. what are the two most commonly use programming languages used when we configure a PLC? 9. What would you do if you accidentally skipped a step in the configuration procedure? 10. How would you know if the configuration were sucessful? 11. Name at least 3 selections available when we configure the burnout protection of a controller?

3 Answers   EI Electrotechnical Institute,

---

why any measurement made interms of pressure is more accurate ? to be more precise most of the flow velocity is made interms of pressure and it is accurate. what is the reason behind pressure measurement being accurate ?

0 Answers   NATPET,

---

What is the diffirence between Earth and Neutral and What is the required normal voltage between earth and neutral

6 Answers  

---