Interested to Buy Any Domain ? << Click Here >> for more details...
How does a redundant controller comes in line when the main
controller fails??
- 3 Answers
- 9536 Views
- Yokogawa, I also Faced
- E-Mail Answers
Answer Posted / asha
Actually there will be no difference between an active
controller & a standby controller both will be performing
the same actions, but there will be an alarm poped up as
soon as any one controller fails in this case the faulty
controller becomes the standby. And once it recovers from
the fault the active controller copies all the records
which it had accumulated during the fault meanwhile the
controller will be having a led glowing at the standby
contoller at the COPY indication once the standby
controller comes in line with the active controller it
indicates HARDRDY. In this way the redundant controller
operates fault.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
How to calibrate RC Feeder system in thermal power station?,If any instrument available to calibrate it,ple inform me. make:stock,
What is eddy current? Describe the operating principle of proximity probe.
Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?
How we connect a instrument with ground, Give brief explanation with help of diagram?
What pressure results for a flow transmitter of range 0- 180t/h in the dcs and 0-301mbar in the field using square root extraction. Kindly also suggest formulae for the percentages 0,25,50,75,100?
why we are not using the turbine flow meter in the steam service?
What is the purpose of LO Overhead tank in turbines.
basic connection and principle of axial shift sensor n differential sensors in tubine describes n draw......
Why are the uses 24vdc in industries
Why we are using reverse action in displacer types level transmitters on some Vessels?
1.what is controller proportional gain 2.what is the controller intergral action time. 3.A proportional plus derivative controller that has a proportional band of 20% and a derivative action time of 0.1 minutes. Construct the shape of the output waveform for the triangular input if the input rises and falls at the rate of 4 units per minute.
why we are using digital signals for I/O & how to measure this signals is getting or not ?
How earthing can be checked????
how do we commission inergen system?
In turbine what does term CDP, NI, NH, HSSOC means.
