Brice,
If you listen to the mp3, you will note that 1). All three PSIMs
start simultaneously and together, so there is no issue in the
preliminary codes of the application....
Even if this were the case, and the PSIMs' timing were identical, the
result would be a constant delay between the modules, not a every
widening delay, which what you hear when the speed is slightly
different (as demonstrated in the mp3).
Dave is right on this one - the PSIMs reflect a 5% error on speed
accuracy.
gary
"Brice D. Hornback" <bdh@...> wrote:
>
> Gary,
>
> The INIT routine in maf-lfo2.bas contains approximately 1.2 seconds
of delay
> in a for/next loop to flash the LEDs on and off, and then another 100ms
> before it even looks for the start signal from either the start
button or
> input. Each of your three PSIM-1 modules may be in a different part
of the
> loop before getting the start signal.
>
> Try the attached file. I modified the INIT sequence and removed the
pauses
> and blinking LEDs. This is as close as you'll get to a synced startup
> sequence. The ATOM-Pro processes approximately 100k lines of code per
> second. This is in a tight loop of 3 lines of code waiting for the
∗start∗.
> Should be close enough. :)
>
> Let me know...
>
> Best regards,
> Brice
>
> ----- Original Message -----
> From: "Gary Chang" <gchang@...>
> To: <ComputerVoltageSources@yahoogroups.com>
> Sent: Tuesday, January 09, 2007 4:26 AM
> Subject: [ComputerVoltageSources] Atompro timing anomolies....
>
>
> > Being one of very few that has more than one of the PSIM-1 module, I
> > did a little test to evaluate the relative timing accuracy of the
> > PSIM'S internal clock, by loading the maf-lfo2.bas application into
> > each of three modules and starting them with a common start pulse.
> >
> > The test results can be heard in an mp3 called PSIM mayhem, found in
> > the files folder of this group.
> >
> > So - it looks as if we are going to need an external sync reference to
> > get these guys to be time reliable. Probably a simple pilot tone
> > (such as a vco) would be the easiest to reference....
> >
> > GC
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
> [Non-text portions of this message have been removed]
>