metern value go to zero

Talks about metering
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f.volpato
Posts: 10
Joined: Sat Nov 14, 2015 10:31 pm

metern value go to zero

Post by f.volpato » Fri Mar 25, 2016 7:53 pm

Hi to all!
in my metern system whit raspberry and modbus power meter type SDM120 the readings on the chart often mark the value zero, See the image to link http://www.b12web.it/loggyb/adv/metern.png.

Someone tell me why?

Thanks,
F.

jeanmarc
Posts: 1600
Joined: Thu Aug 29, 2013 7:16 am

Re: metern value go to zero

Post by jeanmarc » Fri Mar 25, 2016 9:42 pm

Because there is no difference between your 5' samples

f.volpato
Posts: 10
Joined: Sat Nov 14, 2015 10:31 pm

Re: metern value go to zero

Post by f.volpato » Sat Mar 26, 2016 10:09 pm

Thanks! :-)
I understand, but you can avoid it will be represented in this way?

Thanks,
P.

jeanmarc
Posts: 1600
Joined: Thu Aug 29, 2013 7:16 am

Re: metern value go to zero

Post by jeanmarc » Sun Mar 27, 2016 8:31 am

How would you represent a meter that doesn't increase ? :shock:
The same thing happen before 6AM on your example, that is the way it work. The problem is from your com app, not from meterN.
What do you use to read your SDM ?

f.volpato
Posts: 10
Joined: Sat Nov 14, 2015 10:31 pm

Re: metern value go to zero

Post by f.volpato » Mon Apr 18, 2016 9:59 am

To read the sdm use a USB - RS485 converter mounted on a raspberry . I wish that peak down does not have displayed . I wish it were a uniform look .
It's possible?

jeanmarc
Posts: 1600
Joined: Thu Aug 29, 2013 7:16 am

Re: metern value go to zero

Post by jeanmarc » Mon Apr 18, 2016 5:44 pm

Please, past your csv values where it happen. If you directly request sdm120c, then i bet it miss a value.

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