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???
09/21/05 12:37
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#101303 - I don't think it is the problem
Responding to: ???'s previous message
I don't think Bert has a problem creating the needed precise timing in PC, if he claims he has 5ms delay now. While PC, notabene with WinXY fitted, is not intended and not quite suitable for this level of "real-time-ness", it is not impossible to achieve sub-ms precision in timing events (with maybe ocassional dropouts, which the network protocol must be tolerant for).

I think he was asking for recommendation on timing rather than architecture. Unfortunately, my experience is from a smaller in nodes but larger in length 485 network with sometimes uncontrollable cabling (yes, the customer insisted he will make it himself and made it as star and it is already in the wall) and it doesn't need to be so fast, so we rather play on the safe side (low speeds, high delays)...

Jan Waclawek


List of 16 messages in thread
TopicAuthorDate
Delay times for switching RS485 lines?            01/01/70 00:00      
   MODBUS            01/01/70 00:00      
   Driver enable and disable time            01/01/70 00:00      
   caution            01/01/70 00:00      
   delay time            01/01/70 00:00      
   make a master            01/01/70 00:00      
      I don't think it is the problem            01/01/70 00:00      
         not the PC, not the windows            01/01/70 00:00      
   Thank you all            01/01/70 00:00      
      non-pc master            01/01/70 00:00      
      Check out the FTDI serial chip            01/01/70 00:00      
         CRC?            01/01/70 00:00      
            CRC?            01/01/70 00:00      
               I see            01/01/70 00:00      
         Another happy FTDI user            01/01/70 00:00      
      USB as mentioned below sounds good, but            01/01/70 00:00      

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