What is possitive and negative feedback?

Answer Posted / scheau vlad

The positive feedback is when in control room, at console,
operator recive correct all signals from field durring loop
check.
The negative feedback is when he don`t recive some of the
signals, for example testing one control valve with limit
switch, he dont see in the console the indication of the
limit switch.
I hope is usefull answer :)

Is This Answer Correct ?    6 Yes 15 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Draw bode plot of any transfer function. Why is plotting bode necessary?

1871


I need to know steps to Calibration Valve Guard......

995


how to calculate range of level transmitter?

1779


Square root calculation for dp flow transmitter?

672


where are following valves are applicable to install. can any valve be installed any line. globe valve butterfly valve boll valve gate valve

1247






What is the use of temprature compensation?

714


Explain the difference between plc and cnc?

566


How many ohms are required for proper earthing?

647


what is the current pay package for an instrumentation engineer having 2 years of experience in cryogenic technology???????

4275


Can any body tell me about SAP MAINTINANCE MODULE. WHAT IS its function and application. And study material Source about it. I shall be very thankful.

1495


what is the importance of CV in the control valves? how it is calculated?

1962


What happen if we install my pressure transmitter below the elevation of pipe in natural gas service?

634


What is exact difference between the panel earthing and system earthing in DCS system. What is the value of resistence.

2161


Sir,I am going to sit for IOCL written test exam. recently.Can anyone tell me the name of 'Objective type Question Book on Instrumentation Engineering ' which will help me. Pl. mail to bidyut_71@rediffmail.com / bidyut.saha2008@indiatimes.com / bidyut.saha09@yahoo.in

1653


what is controlling card in dcs? how u measure dcs memory?what is bus in dcs?how u know dcs speed n ehternet speed?

1509