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???
05/28/08 15:43
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 		 #155226 - if it is critical system
Responding to: ???'s previous message
The purpose of a watchdog is to restart the uC when it is 'stopped', so why would another controller be needed to 'take over'

Erik; What you said is correct by in time critical system I cannot reset the system. I can run 2nd controller with a backup powersupply also in case of emergency





List of 32 messages in thread
TopicAuthorDate
stanby controller for emergency            01/01/70 00:00      
   ALE pulse            01/01/70 00:00      
   What are the expected problems?            01/01/70 00:00      
   The problem here is...            01/01/70 00:00      
      What about processing speed            01/01/70 00:00      
         processing speed should not be an issue            01/01/70 00:00      
   How do you know if it has failed?            01/01/70 00:00      
      my querry            01/01/70 00:00      
         Use a watchdog            01/01/70 00:00      
            I think watchdog not suitable            01/01/70 00:00      
               watchdog            01/01/70 00:00      
                  if it is critical system            01/01/70 00:00      
               Backup controllers            01/01/70 00:00      
         does that going to help            01/01/70 00:00      
            Where are erik and Andy            01/01/70 00:00      
               Irrespective....            01/01/70 00:00      
                  What you say is correct            01/01/70 00:00      
                     engineering procedure            01/01/70 00:00      
               Where are erik and Andy - asleep            01/01/70 00:00      
   much simpler            01/01/70 00:00      
   always operating or failsafe            01/01/70 00:00      
   Have you considered this ...            01/01/70 00:00      
      there is always a gotcha            01/01/70 00:00      
         Yes, but it always depends ...            01/01/70 00:00      
            hardware description is needed            01/01/70 00:00      
               Is this feasible            01/01/70 00:00      
                  No,            01/01/70 00:00      
                  You have reinvented a watchdog            01/01/70 00:00      
                     this is running in circles because ....            01/01/70 00:00      
                        Nothing's perfect            01/01/70 00:00      
                           not if you are only concerned with hardware failur            01/01/70 00:00      
                              it's all about testing            01/01/70 00:00      

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