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

[Frédéric POTTER]

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.
 
The UPS behaves exactely AS IF IT WAS NOT SUPPERVISED.
 
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 Frédéric
POTTER
Envoyé : mercredi 27 septembre 2006 08:28
À : 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

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