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
- 9575 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 is eddy current? Describe the operating principle of proximity probe.
How to calibrate smoke Dectector
What is difference between radial vibration and axial vibration explain in detail .
what do u mean by compensation n pid tunning?in pid tunning what you tunned?is it possible 2 tune p i d
why we should maintain neutral earth voltage below 1V while calibration? why cant it be 1.2V or 2V
how to calculate signal cable sizing? and multipair cable sizing??explain in brief?
TECHNICAL/ARTITUDE
can we replace a slot sensor (inductive type) with limit switch (potenial free contact / no-nc type).
what is insdustrial vibration.who it works. give atleast 2 types of insdustrial vibration
Describe a time when you anticipated potential problems and developed preventive measures.
TEMPERATURE VARIATION FOR FREQUENTLY.
any one can send me instrumentation previous interview papers? I prepare for MNC Company Interviews? my mail id- Rakesh.Golla@dodsaldxb.ae , and another mail rakesh.gvk@gmail.com
What is three element drum level control system why its better than single element?
What is offset in a control system.
Describe the functions of the Operator Interface including the considerations related to alarming and display layout/configuration/layers.
