How does a redundant controller comes in line when the main
controller fails??
- 3 Answers
- 8264 Views
- Yokogawa, I also Faced
- E-Mail Answers
Answer Posted / rohit kumar
A redundant controller is a pair of standard controllers
on separate 2-wide power/controller carriers that are
connected together. Each controller
requires its own power supply mounted on its carrier. One
of the controllers in the pair is the active controller and
the other controller is the standby controller. There is
no physical difference between the active and
standby, nor is there a preferred position for the active
controller. The controller that boots first becomes the
active controller.
The redundant controllers communicate with each other via a
dedicated high-speed serial bus
The standby controller contains the same configuration as
the active controller and tracks the operation of the
active controller. When an active controller fails, the
standby controller takes over, providing uninterrupted
control
operation without initialization or user intervention. When
the previously active controller recovers to a healthy
state or is replaced, the two controllers automatically
become a redundant pair again.When the active controller
failed the user will recieve an alarm at the HIS
| Is This Answer Correct ? | 16 Yes | 3 No |
Post New Answer View All Answers
I need control valve ISA hand book. Is there any site to download that big book containing all the pages. Written by Paul Friedmann
how to do dynolab wind speed sensor loop test, how to simulate value,i have simulate mA 4-20mA but not responding in DCS faceplate, please kindly advice me any one.
I am manjunath having exp in maintenance of chemical plants,know i want to do a design course INTOOLS,after doing design course can we get jobs in design field.sinve i dont have design exp..
How to check vortex flow meter is in good condition while we do not having calibration setup?
Can anyone send most commonly asked interview question in Oil & Gas industry
What is PDS and PDMS ?
KAlman filter code for two dimension?
IN CONTROL VALVE SPECIFICATIONS GENERALLY TERM " DE- 200" ."DM -400"USED,, WHAT IS DE/ DM STANDS FOR?
How to change dcs card in online. (Dsc is maxdna)
Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...
In my company plc based winders are operated. one day there was a data transmission failure alarm shown on pc. as per sir instruction we have reset master plc but winders were not triped and alarm gone. so what master plc do?
I m appointed as an automation trainee engineer in small firm in that I am only the one , my company give me a project on s7-200 as i m beginner I don't know how to program so please send me the helpful site so that I complete my project before deadline....please help me out in this critical situation.
Boolean algebra
How will you calibrate an Absolute Pr.Transmitter of range 400mmHg absolute ?
How to calibrate an pressure gauge with yantrika test bench?
