Re: Re: VIOM locking up

[David Yeend <david.yeend@xxxxxxxxx>]

My experience is that these sort of spurious 'crashes' in relatively simple
and otherwise stable equipment are generally due to external influences
rather than an exception in internal state.
That said, more complex systems or those which seem prone to regular
crashes can benefit from the self re-set approach.
For the case under consideration I would recommend an external
watchdog/reset system rather than relying on an in-built scheduled reset.
Regards,
David

On 11/15/05, Jim Noble <yahoo-groups@xxxxxxx> wrote:
>
> rectorydp wrote:
>
> > I would agree that you don't want critical functions on
crash-prone
> > products, however, I do not think this is the case with the VIOM.
I
> > have now made sure that all my VIOMs are on good qulity psu's and
> > implemented a heartbeat over the serial interface in case
something
> > does go wrong. An automatic power cycle after a couple of missed
> > heartbeats has always worked.
>
>
> Why not use a spare output to reset a watchdog timer? If it crashes
and
> fails to reset the timer, the timer hits the reset line... (assuming
it
> has one there!) Do your bit to help deplete the european 555 timer
> mountain...
>
> And/or code in a hard reset every N minutes/hours/days?
>
> Jim
>
>
>
>
> Yahoo! Groups Links
>
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>


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