[Nut-upsuser] Ellipse 750 USBS auto shutdown and NUT.

[Peter Selinger]

=?iso-8859-1?Q?Fr=E9d=E9ric_POTTER?= wrote:
> 
> Thanks jimmy for the hints, but I'm afraid the description of the
> problem I have was not clear.
> 
> The problem I have is NOT a software configuration issue of NUT.
> The problem I have is that the UPS, when reaching battey.charge.low
> SHUTS DOWN ITSELF IMMEDIATELY, without sending anything to NUT over
> the serial port. Whatever would be my NUT configuration, it has no
> time to run, since the computer is shut down immediately.

This is what I understood from your previous mail. But I believe what
Jimmy was suggesting is that you could configure NUT to begin shutting
down the system *before* your UPS reaches battery.charge.low (30%);
for example, to do it when your battery charge drops below 90%, or to
do it as soon as the power failure starts. This should give the system
enough time to shut down before your UPS decides to turn itself off. 

> The UPS behaves exactely AS IF IT WAS NOT SUPPERVISED.

I disagree. An unsupervised UPS should not shut down when it reaches
battery.charge.low.

> My guess is that there is some logic within the USBS 750 that makes
> him decide, upon reaching the low battery state, to negociate with a
> software that suppervises him (over the USB or serial port) OR, if
> not suppervised by software, to shut down itself immediately to
> protect its battery.
> 
> My guess is that this behavior is not properly working, and they may
> be two reasons
>     * OR the Ellipse has a firmware issue that makes him believe it
> is not suppervised when suppervised through the SERIAL port (and not
> the USB)
>     * OR NUT is not properly sending some commands to set some
> parameters to the UPS to make it enter the proper mode.
> 
> Any hints from MGE people here ?
> 
> thanks
> 
> fred
> 
> -----Message d'origine-----
> De : nut-upsuser-bounces at lists.alioth.debian.org
> [mailto:nut-upsuser-bounces at lists.alioth.debian.org] De la part de 
> Fr=E9d=E9ric
> POTTER
> Envoy=E9 : mercredi 27 septembre 2006 08:28
> =C0 : nut-upsuser at lists.alioth.debian.org
> Objet : [Nut-upsuser] Ellipse 750 USBS auto shutdown and NUT.
> 
> 
> 
> Hello,
> 
> I've installed & configured NUT 2.0.4 connected over a serial port to an 
> MGE
> USBS 750.
> 
> When the UPS enters the 'critical' state (ie, battery load below the 
> defined
> battery.charge.low AND power input off), the UPS just shutdown itself
> instead of notifying NUT.
> When I say the UPS just shutdown, I mean it autonomously shut down 
> itself
> within one second after reaching the low battery state (which is 
> defaulted
> to 30%). When the power is restored, the UPS restarts properly.
> 
> I was not able to find internal parameters within the UPS that would 
> allow
> me to cancel this behavior (and have the usual behavior of the UPS 
> sending
> an alarm to NUT and waiting to be shutdown by the "halt" script 
> upsdrvctl
> shutdown command).
> 
> My guess is that the UPS "knows" if it is connected to an host or not.
> Maybee in case of using the serial port this does not work ? (and the 
> UPS
> thinks it is not suppervised ?) Maybee shall NUT send it some command at
> some point to notify this ?
> 
> Any help appreciated.
> 
> thanks
> 
> fred