Nut upsuser - Jan 2012 - Semantic relationships between shudown.stayoff, shutdown.return, and ups.start.auto

Nut-names.txt states that

1.       ups.start.auto controls whether the UPS starts when mains is
(re)applied.

2.       shutdown.stayoff causes "turn off the load possibly after a delay
and remain even if power returns".

3.       shutdown.return causes "turn off the load possibly after a delay
and return when power is back".

1 seems to conflict with 2 and 3.  That is, 2 implies that ups.start.auto=no and
3 implies that ups.start.auto=yes.

Can someone please explain to me the expected behavior for the following cases?


a.       shutdown.stayoff when ups.start.auto=yes

b.      shutdown.stayoff when ups.start.auto=no

c.       shutdown.return when ups.start.auto=yes

d.      shutdown.return when ups.start.auto=no

Thanks,
Rich

PS, I am working with the Eaton Powerware 5115 which as no ups.start.auto
variable, and in that case the semantics are clear.  But, I am also working with
an Eaton Evolution 1550 which does have a ups.start.auto variable, and in that
case the semantic relationships are not clear.
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On Jan 14, 2012, at 9:52 AM, Rich Wrenn wrote:
> Nut-names.txt states that
> 1.       ups.start.auto controls whether the UPS starts when mains is
(re)applied.
> 2.       shutdown.stayoff causes ?turn off the load possibly after a delay
and remain even if power returns?.
> 3.       shutdown.return causes ?turn off the load possibly after a delay
and return when power is back?.
>  
> 1 seems to conflict with 2 and 3.  That is, 2 implies that
ups.start.auto=no and 3 implies that ups.start.auto=yes.
My understanding of the "ups.start.auto" setting is that it only
applies when an explicit shutdown command has not been given (and therefore
would be overridden by one of the shutdown.* commands, if NUT is configured to
manage the shutdown process).

That said, I'll defer to someone who knows the specifics of the Eaton
hardware for information on how it should work. The UPS firmware has a lot of
leeway in how the commands and settings are interpreted.

-- 
Charles Lepple
clepple at gmail