Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #184299 > unrolled thread

Power draw from UPS

Back to article view | Back to linux.debian.user

Contents

  Power draw from UPS g <sendmailtogoran@gmail.com> - 2017-07-27 12:30 +0200
    Re: Power draw from UPS <tomas@tuxteam.de> - 2017-07-27 12:40 +0200
    Re: Power draw from UPS Ron Leach <ronleach@tesco.net> - 2017-07-27 13:10 +0200
    Re: Power draw from UPS Darac Marjal <mailinglist@darac.org.uk> - 2017-07-27 13:40 +0200
    Re: Power draw from UPS Felix Miata <mrmazda@earthlink.net> - 2017-07-27 15:00 +0200
    Re: Power draw from UPS Jörg-Volker Peetz <jvpeetz@web.de> - 2017-07-27 20:50 +0200
      Re: Power draw from UPS g <sendmailtogoran@gmail.com> - 2017-07-28 13:20 +0200
        Re: Power draw from UPS Dan Purgert <dan@djph.net> - 2017-07-28 15:20 +0200
          Re: Power draw from UPS Dan Ritter <dsr@randomstring.org> - 2017-07-28 16:10 +0200
            Re: Power draw from UPS Goran <sendmailtogoran@gmail.com> - 2017-07-28 20:50 +0200
              Re: Power draw from UPS deloptes <deloptes@gmail.com> - 2017-07-28 21:50 +0200

#184299 — Power draw from UPS

Hi all, I want to get the power draw from a APC USB UPS. I have managed
to run apcusbd and apctest. But how to invoke these tools to get the
actual power draw in Watt x Ampere?

I've found this page which describes how to read it via RS232 serial
port.

https://forums.anandtech.com/threads/got-an-apc-smart-ups-measure-real-
power-with-it.55847/

But I dont't have such a port neither a cable.

Regards
Goran

[toc] | [next] | [standalone]

#184300

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On Thu, Jul 27, 2017 at 12:27:14PM +0200, g wrote:
> Hi all, I want to get the power draw from a APC USB UPS. I have managed
> to run apcusbd and apctest. But how to invoke these tools to get the
> actual power draw in Watt x Ampere?
> 
> I've found this page which describes how to read it via RS232 serial
> port.
> 
> https://forums.anandtech.com/threads/got-an-apc-smart-ups-measure-real-
> power-with-it.55847/
> 
> But I dont't have such a port neither a cable.

It's most likely that the USB "appears" as a virtual serial
port. Try the command "lsusb" on a console. The option "-v"
makes it more verbose.

Cheers
- -- tomás
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)

iEYEARECAAYFAll5wqkACgkQBcgs9XrR2kaYvACePSp8iQ14cVcu/PqHNt9vV5g6
uIEAnjGSsqlcE+hHWtn9HV7SsldLiqUw
=H773
-----END PGP SIGNATURE-----

[toc] | [prev] | [next] | [standalone]

#184301

On 27/07/2017 11:27, g wrote:
> Hi all, I want to get the power draw from a APC USB UPS. I have managed
>
[...]
> But I dont't have such a port neither a cable.


Our APC UPSs included a USB cable in the box.  The cable uses a USB 
plug at one end (into the linux machine) and a different plug at the 
other end, looking something similar to RJ11 or RJ45 sort of 
appearance, to plug into the APC UPS.

regards, Ron

[toc] | [prev] | [next] | [standalone]

#184303

[Multipart message — attachments visible in raw view] — view raw

On Thu, Jul 27, 2017 at 12:27:14PM +0200, g wrote:
>Hi all, I want to get the power draw from a APC USB UPS. I have managed
>to run apcusbd and apctest. But how to invoke these tools to get the
>actual power draw in Watt x Ampere?

What model of UPS is it? Many of the newer models use a protocol called
"Microlink" (aka MODBUS over USB) . APC (and their parent Schneider
Electric) have been quite secretive about this protocol, unlike the
older protocol where they provided nice interface specifications.

So, firstly, make sure you're using a sufficently new version of APCUPSd
(3.14.13 or newer). Secondly, check that you're using the modbus
protocol: http://www.apcupsd.org/manual/manual.html#modbus-driver
Finally, if that doesn't help, then it may simply be that the UPS isn't
reporting the required information.

>
>I've found this page which describes how to read it via RS232 serial
>port.
>
>https://forums.anandtech.com/threads/got-an-apc-smart-ups-measure-real-
>power-with-it.55847/
>
>But I dont't have such a port neither a cable.
>
>Regards
>Goran
>

-- 
For more information, please reread.

[toc] | [prev] | [next] | [standalone]

#184306

g composed on 2017-07-27 12:27 (UTC+0200):

> Hi all, I want to get the power draw from a APC USB UPS. I have managed
> to run apcusbd and apctest. But how to invoke these tools to get the
> actual power draw in Watt x Ampere?

> I've found this page which describes how to read it via RS232 serial
> port.

> https://forums.anandtech.com/threads/got-an-apc-smart-ups-measure-real-
> power-with-it.55847/

> But I dont't have such a port neither a cable.

Sounds like you may be candidate for one of these:
http://www.ebay.ca/itm/152386308824
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

[toc] | [prev] | [next] | [standalone]

#184327

Maybe this is helpful
APC UPS - ArchWiki https://wiki.archlinux.org/index.php/APC_UPS
Please report back if and how it works.

Regards,
jvp.

[toc] | [prev] | [next] | [standalone]

#184344

I've found out that apcaccess is my friend. When used with attached UPC
via USB, it tells a lot about the UPC:

https://linux.die.net/man/8/apcaccess

and the line

RETPCT : Battery charge % required after power off to restore power

is the key. My UPC has a max power of 900 watt. RETPCT shows 30.0%. So:

900w x 0.30 = 270w

270 watt is the actual power draw of my server.

Regards
 
Am Donnerstag, den 27.07.2017, 20:46 +0200 schrieb Jörg-Volker Peetz:
> Maybe this is helpful
> APC UPS - ArchWiki https://wiki.archlinux.org/index.php/APC_UPS
> Please report back if and how it works.
> 
> Regards,
> jvp.
> 

[toc] | [prev] | [next] | [standalone]

#184347

g wrote:
> I've found out that apcaccess is my friend. When used with attached UPC
> via USB, it tells a lot about the UPC:
>
> https://linux.die.net/man/8/apcaccess
>
> and the line
>
> RETPCT : Battery charge % required after power off to restore power
>
> is the key. My UPC has a max power of 900 watt. RETPCT shows 30.0%. So:
>
> 900w x 0.30 = 270w
>
> 270 watt is the actual power draw of my server.

Maybe I'm misreading it -- but it sounds like "RETPCT" is the required
battery charge level before the UPS will restore power to connected
devices, assuming the battery runs flat.


-- 
|_|O|_| Registered Linux user #585947
|_|_|O| Github: https://github.com/dpurgert
|O|O|O| PGP: 05CA 9A50 3F2E 1335 4DC5  4AEE 8E11 DDF3 1279 A281

[toc] | [prev] | [next] | [standalone]

#184350

On Fri, Jul 28, 2017 at 01:04:30PM -0000, Dan Purgert wrote:
> g wrote:
> > I've found out that apcaccess is my friend. When used with attached UPC
> > via USB, it tells a lot about the UPC:
> >
> > https://linux.die.net/man/8/apcaccess
> >
> > and the line
> >
> > RETPCT : Battery charge % required after power off to restore power
> >
> > is the key. My UPC has a max power of 900 watt. RETPCT shows 30.0%. So:
> >
> > 900w x 0.30 = 270w
> >
> > 270 watt is the actual power draw of my server.
> 
> Maybe I'm misreading it -- but it sounds like "RETPCT" is the required
> battery charge level before the UPS will restore power to connected
> devices, assuming the battery runs flat.

Yeah. I think that LOADPCT * NOMPOWER gives you the actual
usage.

-dsr-

[toc] | [prev] | [next] | [standalone]

#184366

[Multipart message — attachments visible in raw view] — view raw

Yes, I checked with a simple wattmeter and it's correct.

[send by mobile device]

Am 28.07.2017 4:07 nachm. schrieb "Dan Ritter" <dsr@randomstring.org>:

> On Fri, Jul 28, 2017 at 01:04:30PM -0000, Dan Purgert wrote:
> > g wrote:
> > > I've found out that apcaccess is my friend. When used with attached UPC
> > > via USB, it tells a lot about the UPC:
> > >
> > > https://linux.die.net/man/8/apcaccess
> > >
> > > and the line
> > >
> > > RETPCT : Battery charge % required after power off to restore power
> > >
> > > is the key. My UPC has a max power of 900 watt. RETPCT shows 30.0%. So:
> > >
> > > 900w x 0.30 = 270w
> > >
> > > 270 watt is the actual power draw of my server.
> >
> > Maybe I'm misreading it -- but it sounds like "RETPCT" is the required
> > battery charge level before the UPS will restore power to connected
> > devices, assuming the battery runs flat.
>
> Yeah. I think that LOADPCT * NOMPOWER gives you the actual
> usage.
>
> -dsr-
>
>

[toc] | [prev] | [next] | [standalone]

#184368

Goran wrote:

> Yes, I checked with a simple wattmeter and it's correct.
> 
> [send by mobile device]


ahh, those mobile devices... you top posted

What exactly did you check, so that it is correct ... I'm a simple man and
can not read minds yet.

regards

[toc] | [prev] | [standalone]

Back to top | Article view | linux.debian.user

csiph-web