Hi,.....
i am developing a product. The same requires Hot redundancy of the two microcontrollers. The input & Outputs will be comman for both controllers. HMI & keyboard will be comman for the both. The failure of one controller shall be taken care by another. Is it possible to do the same. If any other option is available please suggest.
... what if the "compare logic" fails.
Erik
That is probably the least of all problems involved.
In past projects, we found the most likly failure was the sensors and actuators. We designed the actuators such that a failure would not be critical and we had sensors to detect acuator failures. We had second and third controllers to sense but they were not always connected to the same sensors as the main controller. Control lines from the 'helper' controllers would enable or disable drive from the main controller. So, the 'helper' controllers were just redundant monitors, not parallel controllers. Bradford