Nut upsdev - Jun 2014 - Question about voltage threshold setting in NUT

Hello Charles,

Thank you so much for your reply.

Yes. 40v was too low. In windows, those range started from 76v, 85v, and
96v. Just tried upsrw command to modify input.transfer.low and
input.transfer.boost.low. There were some error messages returned. Tried
another one battery.charge.low and it returns ok.

$  sudo upsrw -s input.transfer.low=70 -u * -p * ups
Unexpected response from upsd: ERR READONLY

$ sudo upsrw -s input.transfer.boost.low=70 -u * -p * ups
Unexpected response from upsd: ERR VAR-NOT-SUPPORTED

$ sudo upsrw -s battery.charge.low=70 -u * -p * ups
OK




On Wed, Jun 4, 2014 at 3:48 PM, Charles Lepple <clepple at gmail.com>
wrote:
> On Jun 3, 2014, at 5:16 PM, Shen Chuan wrote:
>
> > We have an Eaton 3S 550 UPS using NUT tool to send power loss event.
By
> default the power voltage threshold is set to 85 volts. If the voltage is
> less than 85 volts, it will trigger ONBATT event from NUT. Is there a way
> in NUT we can change the threshold from 85 volts to a lower voltage like 40
> volts?
>
> It might be possible with upsrw - try modifying
"input.transfer.low" and
> "input.transfer.boost.low".
>
> However, 40V to 110-120V is a long way to boost. Is this UPS rated for
> such a wide voltage range?
>
> You could also check for sensitivity settings. I don't know about the
3S
> in particular, but theoretically, usbhid-ups supports those sorts of
> settings.
>
> --
> Charles Lepple
> clepple at gmail
>
>
>
>
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On Jun 4, 2014, at 6:38 PM, Shen Chuan wrote:
> $ sudo upsrw -s battery.charge.low=70 -u * -p * ups
> OK
Not sure this does what you originally asked, though.

Does upsc show any settings related to sensitivity?

-- 
Charles Lepple
clepple at gmail

Hello Charles,

Thank you so much for your help. Just run upsc and it is possible that
input.transfer.low is the one because we used power regulator to bring down
the power around 84v and then the ups sent the power loss message to PC. Do
you think some others may take effect for the low voltage? Just have the
upsc result attached.

Then I retried input.transfer.low, default.input.transfer.low,
overwrite.input.transfer.low. Looks like it still can not write to those
params.

$  sudo upsrw -s input.transfer.low=70 -u * -p * ups
Unexpected response from upsd: ERR READONLY

$  sudo upsrw -s default.input.transfer.low=70 -u * -p * ups
Unexpected response from upsd: ERR VAR-NOT-SUPPORTED

$ sudo upsrw -s overwrite.input.transfer.low=70 -u * -p * ups
Unexpected response from upsd: ERR VAR-NOT-SUPPORTED

battery.charge: 100
battery.charge.low: 20
battery.runtime: 1087
battery.type: PbAc
device.mfr: EATON
device.model: Eaton 3S 550
device.serial: 000000000
device.type: ups
driver.name: usbhid-ups
driver.parameter.offdelay: 90
driver.parameter.ondelay: 120
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.parameter.vendorid: 0463
driver.version: 2.6.5
driver.version.data: MGE HID 1.31
driver.version.internal: 0.37
input.transfer.high: 142
*input.transfer.low: 84*
outlet.1.desc: PowerShare Outlet 1
outlet.1.id: 2
outlet.1.status: on
outlet.1.switchable: yes
outlet.2.desc: PowerShare Outlet 2
outlet.2.id: 3
outlet.2.status: off
outlet.2.switchable: yes
outlet.desc: Main Outlet
outlet.id: 1
outlet.switchable: no
output.frequency.nominal: 60
output.voltage: 115.0
output.voltage.nominal: 115
ups.beeper.status: enabled
ups.delay.shutdown: 90
ups.delay.start: 120
ups.firmware: 02
ups.load: 23
ups.mfr: EATON
ups.model: Eaton 3S 550
ups.power.nominal: 550
ups.productid: ffff
ups.serial: 000000000
ups.status: OL CHRG
ups.timer.shutdown: 0
ups.timer.start: 0
ups.vendorid: 0463

Thank you again for your help. Kind of running out of ideas.

Regards,

Shen




On Wed, Jun 4, 2014 at 9:24 PM, Charles Lepple <clepple at gmail.com>
wrote:
> On Jun 4, 2014, at 6:38 PM, Shen Chuan wrote:
>
> > $ sudo upsrw -s battery.charge.low=70 -u * -p * ups
> > OK
>
> Not sure this does what you originally asked, though.
>
> Does upsc show any settings related to sensitivity?
>
> --
> Charles Lepple
> clepple at gmail
>
>
>
>
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