How does a redundant controller comes in line when the main
controller fails??
- 3 Answers
- 8311 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
What denotes the 5/8mm in the 3300XL 5/8mm proximitor probe?
There are many type of control cable like pair,core,tried, What are defination each one
What are the types of control valves available
WHAT ARE THE INSTRUMENTAL DIAGRAMSOF VALVES?
how pressurize drum calibrated ?
why micro controller 8051/52's clock frequency is internally divide by 12 ?? and why it is further divide by 32 in UART serial communication ??
What is the right procedure for adjusting the gap voltage of bently nevada vibration sensor?
how to calibrate and troubleshooting of leveltroll?
Linear amplifier.
Can anyone send most commonly asked interview question in Oil & Gas industry
In which principles tx ,pressure gauge,Temp gauge,control valve works?
what deference between panel earth and systemearth
Which is your favourite subject & explain any one topic of it.
What is hp & mp seperator .& what is its working principle ?
In power plant to measure vibration of a turbine we install sensors. Before install this sensor we have to set gap voltage. What is meant by gap voltage and its use?
