ModDiffCalculator

[kcks66]

Hi Mikhail,

Thanks for the ModDiffCalculator module to try. I wish to get energy usage for every 30 minutes. My source channel 101 is cumulative kWh from energy meter, destination channel 102 is energy consumption every 30 minutes calculated channel type.

Kindly advice whether my configuration is correct?

https://ibb.co/x6b1F1x

One more thing is I set 30 minutes different; am I getting data timestamp at every HH:00:00 and HH:30:00 exactly?

Thank you.

[Mikhail]

Hi,
Tee configuration looks correct. Note that you use Minute archive to read and write data.

> am I getting data timestamp at every HH:00:00 and HH:30:00 exactly?
Yes, if Offset is 00:00:00.

[Mikhail]

Look for useful info in the module log.

[kcks66]

Hi Mikhail,

I have one question; example if there is no data/data lost (channel 101) before 9:00:00 PM but resume back before 9:30:00 PM, what happen to the ModDiffCalculator module to calculate (channel 102) at 9:30:00 PM?

Channel 102 (9:30:00 PM, data?) = Channel 101 (9:30:00 PM, got data) – Channel 101 (9:00:00 PM, no data)

Pls advice and thank you.

[Mikhail]

Hi,
To calculate the difference, the both data points must be defined. Otherwise, the difference is not calculated. In that case, you can set data manually, and then send a command to recalculate diffs for the period of time.

[kcks66]

Hi Mikhail,

Noted. Going to give it a try. Thanks.

[kcks66]

Hi Mikhail,

I configured custom period to 00:30:00. Somehow after I saved and upload to server the custom period became 00:00:00. I tried many times the custom period looks like always reset to 00:00:00.

<?xml version=”1.0″ encoding=”utf-8″?>
<ModDiffCalculator>
<GeneralOptions>
<CmdCode />
</GeneralOptions>
<Groups>
<Group active=”true” name=”30 Minutes” periodType=”Minute” offset=”00:00:00″ delay=”10″ archiveBit=”1″>
<Item srcCnlNum=”101″ destCnlNum=”102″ />
</Group>
</Groups>
</ModDiffCalculator>

The module log:

https://ibb.co/BnVg8wD

I checked result from excel is the different calculation is based on 1 minute.

https://ibb.co/NFGbz1t

Pls advice and thank you.

[kcks66]

I should select custom period then is ok.

<?xml version=”1.0″ encoding=”utf-8″?>
<ModDiffCalculator>
<GeneralOptions>
<CmdCode />
</GeneralOptions>
<Groups>
<Group active=”true” name=”30 Minutes” periodType=”Custom” customPeriod=”00:30:00″ offset=”00:00:00″ delay=”10″ archiveBit=”1″>
<Item srcCnlNum=”101″ destCnlNum=”102″ />
</Group>
</Groups>
</ModDiffCalculator>

[Mikhail]

Hi,
Right, you need to set Period type = Custom before saving the configuration.

[kcks66]

Hi Mikhail,

I got the result in Minute archive as shown below:

https://ibb.co/jfwNKx8

I see every 30 minutes got data as expected. Somehow there is always 0 if out of HH:00:00 and HH:30:00. Is ModDiffCalculator working like this?

The other part is data channel 102 always 0 in the Table, as below:

https://ibb.co/hCxX9Gj

Since the Channel 102 always show 0 I couldn’t use to attach to a Dynamic Text in Scheme as well as use as source channel for another calculated channel to further formula function.

Pls advice for my ModDiffCalculator configuration:

https://ibb.co/x6b1F1x

Thank you.

[Mikhail]

Hi,
I suggest to use the hourly archive instead of the minute archive. This helps to avoid 0 between data points. You can set 30 mins period for the hourly archive.

Schemes display the current data, while ModDiffCalculator works with historical data. To display historical data, use table views and reports.

> The other part is data channel 102 always 0 in the Table
Because a table view displays data from the hourly archive by default.

[Author]

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