[Nut-upsuser] UPS Shutdown

Roger Price roger at rogerprice.org
Thu Oct 6 09:35:12 UTC 2016

On Wed, 5 Oct 2016, Mike wrote:

> I have found the shutdown delay to be quite elusive within the NUT realm.
> I have asked for the kind folk of this mailing list to post those UPS's 
> which actually can implement the shutdown delay concept. I have not seen 
> anything posted, here or on the website, to that effect.
> Nor have I seen any manner of documentation in the various UPS profiles
> that would suggest whether or not a specific UPS actually obeys and
> complies with the shutdown delay concept.

> Something as critical as the shutdown delay should be so supremely 
> documented that it is child's play. But it is not.  It currently is 
> wizardry, if it exists at all.

Hi Mike, The current NUT has evolved from a little documentation and a lot 
of experimenting.  As an example of the lack of manufacturer's 
documentation, see Eaton's "POWER FAILURE SHUTDOWN TIMELINE" for their 

This page, from a leading UPS manufactuer fails to document the offdelay, 
which is hidden in the yellow bars labelled "System Shutdown".  It does 
succeed in describing the Power-On Delay.

It is not possible for NUT to take over the documentation of the 
idiosyncracies of each UPS.  All NUT can say is "Try this with your UPS".

However there is a need for a minimalist description of a working NUT 

  * A drawing and three sentences each to describe the NUT components 
(without upssched).

  * A working example of a set of configuration files for a single 
workstation which will shut down the workstation and the UPS when LB is 

One sheet of A4. Or the electronic equivalent.

We are looking for a volunteer to draft this sheet :-)

Best Regards, Roger

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