> After reading over Microchip's CAN application notes and datasheets I've
> decided that CAN is an easier solution for what I'm doing. However, I
> haven't been able to find any info on transmission length vs
> transmission speed. I only need 9600bps over about 60ft. Anybody know
> for sure if that will work?

The NMEA2000 standard defines a CAN implementation for marine use.  I'm sure
these guys have done their homework.  NMEA2000 runs at 250Kbits/sec at a
maximum bus length of 200 meters.  The standard also mentions that future
versions might support some of the following bit rates and lengths:

  Kbits/sec   Meters
  ---------   ------
       1000       25
        500       75
        250      200
        125      500
         62.5   1100

These values are probably very conservative.  If you are using decent cable,
then I would use these values to indicate the length you can use safely
without having to do any analisys yourself.  In other words, 1Mbit/sec
should be fine within a single machine or whatever.  You probably need to
use lower speed between machines, accross the factory floor, etc.  Then
again, CAN is probably not the right choice for those kinds of applications.


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads