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
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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