[Nut-upsdev] mge-xml.c voltage conversion problem

[Kiss Gabor (Bitman)]

Dear Arjen, Arnaud et al,

I've just organized an MGE UPS with Ref. 66074 SNMP/Web Transverse Card
for testing purposes.

Months ago I found a quite simple bug in the UPS-MIB implementation
of this card and Schneider Electric guys seemed not to have intention
and/or knowledge to fix it.

Now local representative sent me an MGE "Pulsar Extreme 2000 VA" model
in order to find an alternative way to poll our two
"Galaxy 5000 UPS" units.

I started the tests with netxml-ups driver. The very first thing
I noticed that upsc reports 1/10th of input/output AC voltages.

Raw HTTP stream:
[...]
<OBJECT name='UPS.PowerConverter.Output.Phase[1].ActivePower'>0</OBJECT>
<OBJECT name='UPS.PowerConverter.Output.Phase[1].ApparentPower'>0</OBJECT>
<OBJECT name='UPS.PowerConverter.Input[2].Phase[11].Voltage'>0</OBJECT>
<OBJECT name='UPS.PowerConverter.Input[2].Phase[1].Current'>0</OBJECT>
<OBJECT name='UPS.PowerConverter.Output.Phase[1].Current'>0</OBJECT>
<OBJECT name='UPS.PowerConverter.Output.Phase[11].Voltage'>233</OBJECT>
<OBJECT name='UPS.PowerConverter.Output.Phase[1].Voltage'>0</OBJECT>
[...]

<OBJECT name='UPS.PowerConverter.Input[1].Phase[11].Voltage'>220</OBJECT>
<OBJECT name='UPS.PowerConverter.Input[1].Phase[1].Current'>10</OBJECT>

<OBJECT name='UPS.PowerConverter.Input[1].Phase[22].Voltage'>50</OBJECT>
<OBJECT name='UPS.PowerConverter.Input[1].Phase[2].Current'>2</OBJECT>

<OBJECT name='UPS.PowerConverter.Input[1].Phase[33].Voltage'>50</OBJECT>
<OBJECT name='UPS.PowerConverter.Input[1].Phase[3].Current'>2</OBJECT>

<OBJECT name="UPS.PowerSummary.Voltage">94.0</OBJECT>
<OBJECT name="UPS.PowerSummary.Current">0</OBJECT>

[...]

upsc output:
[...]
input.bypass.frequency: 0.0
input.bypass.L1-L2.voltage: 0
input.bypass.L1.current: 0
input.frequency: 50.0
input.L1-L2.voltage: 21.8
input.L1.current: 1.0
input.L2-L3.voltage: 5.0
input.L2.current: 0.2
input.L3-L1.voltage: 5.0
input.L3.current: 0.2
outlet.desc: Master
outlet.switchable: yes
output.frequency: 50.0"
output.L1-L2.voltage: 23.1
output.L1-N.voltage: 0
output.L1.current: 0.0
[...]

Checking mge-xml.c I found that several values read from network
socket are divided by 10 by convert_deci() function:

"UPS.PowerConverter.Input[1].Phase[11].Voltage"
"UPS.PowerConverter.Input[1].Phase[22].Voltage"
"UPS.PowerConverter.Input[1].Phase[33].Voltage"
"UPS.PowerConverter.Input[1].Phase[1].Current"
"UPS.PowerConverter.Input[1].Phase[2].Current"
"UPS.PowerConverter.Input[1].Phase[3].Current"
"UPS.PowerConverter.Output.Phase[1].Current"
"UPS.PowerConverter.Output.Phase[2].Current"
"UPS.PowerConverter.Output.Phase[3].Current"
etc.

I wonder if MGE hurts its own specifications or this card
is generally incompatible with other products or this is
a bug in the experimental driver?

What kind of tests you want me to run?
Do you need direct access to this test device? :-)

Cheers

Gabor
-- 
Megölték Kenny-t. A szemetek!