What is possitive and negative feedback?
Answers were Sorted based on User's Feedback
Answer / abdul
Positive feedback is giving some amount of o/p to i/p in
phase.Whereas Negative feedback is giving some amount of o/p
to i/p with 180 degree out of phase.
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / farooq
what is diffrent between smart and hart communicator
Is This Answer Correct ? | 2 Yes | 7 No |
Answer / 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 |
Hi friends, from Aug 4th onwards iam getting spikes for analog inputs in our DCS for a period of 800ms. I throughly checked every thing, finally i found that the DI, DO's from MCC panels shields are terminated in the Signal Earth where Analog Input signals shields are terminated. Is there any problem with this type of termination?. i checked the induction voltage from MCC and getting around 25VAC, please suggest me in this concern. Our plant is 8months old only. DCS is Siemens Make Simatic PCS7, and the transmitters are Yokogawa make.
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