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???
08/15/06 16:47
Modified:
  08/15/06 16:54
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 		 #122293 - I do not think that is what David does
Responding to: ???'s previous message
It's very likely that a ladder logic interpreter could be implemented in a MCU, even an 805x type.
I would not even think of doing that, just look at the size of whatever 'ladder logic interpreter' you have 'lying around'. Sure, if you make the interpreter so simple that it is 'for all practical purposes unusable' it may very well fit in a '51.

I do not think that is what David does, his website show a CD with a 'ladder logic interpreter'

Anyhow I do believe that I have seen a PLC (the control unit operating off 'interpreted ladder logic') that had a '51 in it I believe it was one of the relay manufactureres that made it.

Erik

List of 31 messages in thread
TopicAuthorDate
Interupt question......            01/01/70 00:00      
   quick answer..            01/01/70 00:00      
   Noise            01/01/70 00:00      
   Perplexed......            01/01/70 00:00      
   Interrupt            01/01/70 00:00      
      does not matter            01/01/70 00:00      
         Attack            01/01/70 00:00      
            You did ask for it            01/01/70 00:00      
         Interruptifobia            01/01/70 00:00      
            There's not always a performance penalty            01/01/70 00:00      
               there is always an exception            01/01/70 00:00      
                  the controller task            01/01/70 00:00      
   very busy processor......            01/01/70 00:00      
      most likely it is not            01/01/70 00:00      
         PLC ?            01/01/70 00:00      
            since forever            01/01/70 00:00      
   Definatly a PLC....            01/01/70 00:00      
      a link            01/01/70 00:00      
      The application may be a PLC, but the chip is not            01/01/70 00:00      
         I do not think that is what David does            01/01/70 00:00      
   code......            01/01/70 00:00      
   Sorry......            01/01/70 00:00      
      Just post            01/01/70 00:00      
         code post.....            01/01/70 00:00      
            Posting Code and Idea            01/01/70 00:00      
            Where are ....            01/01/70 00:00      
   Ok back on this interupt routine            01/01/70 00:00      
      put an inverter on the pin            01/01/70 00:00      
   ZERO CROSS DETECTOR....            01/01/70 00:00      
      Saif, please and a note            01/01/70 00:00      
         actually...            01/01/70 00:00      

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