[Nut-upsuser] UPS

[Arnaud Quette]

Hi Michael Hatzakis Jr

2011/1/2 Michael Hatzakis Jr <mail at hatzakis.net>

>  Arnaud Quette,
>
>
>
> I have read in depth your page regarding APC UPS programming.  I hope you
> don’t mind taking a moment to assist me.  I see that Russel Kroll has long
> since retired.  I read your APC smart protocol page as well as that of
> Jjoseph, http://www.jjoseph.org/notes/apc_smartups_battery_float_voltage regarding programming the APC SU2200 and SU1500.  In particular, I am
> interested in the use of the battery gain control, B + and B – commands to
> reduce or increase the battery voltage by changing the gain setting.
>
>
>
> What is interesting to me is that in reading multiple posts and sites, on
> some unit, this changes the battery control voltage and in others, it
> changes only the read voltage of the A/D converter.  I tried this on my APC
> SU2200XL and changing the gain, actually, changed the read voltage only, and
> did not change the real voltage on the output of the battery terminals.
> Appears opposite what yours and Joseph’s page suggests for the SUA1500 but
> similar to that of the SU700.
>
>
>
> My bottom line is that I need to reduce my float voltage as it is now at
> 56volts, too high for a float and will ultimately damage my new batteries.
> Do you have any insight on how to reduce the output voltage, NOT, just what
> the unit reads?  Do you have any insight on the inconsistency of the B
> command on various UPS?
>

I have personally no insight on these units, have never worked on this
driver (apart from applying trivial patches) and have no clue on the serial
protocol.

so your best bet is to subscribe to the NUT user mailing list, and start
(continue!) a discussion on this topic.

cheers,
Arnaud
-- 
Linux / Unix Expert R&D - Eaton - http://powerquality.eaton.com
Network UPS Tools (NUT) Project Leader - http://www.networkupstools.org/
Debian Developer - http://www.debian.org
Free Software Developer - http://arnaud.quette.free.fr/
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