Only Archive on “Status change”

[TroyV23]

Hi,

I have a digital input logger device in the field that communicates with RapidScada via modbus, and currently I am polling the device to get updated status of each input “ON” or “OFF” but this creates a lot of wasted data.

A preferred, and more efficient method would be if the archive only contained time stamps when the input status changed, and what that status changed to.

For Example…

Current setup:

Input0001 – ON – 10:00:01
Input0001 – ON – 10:00:02
Input0001 – ON – 10:00:03
Input0001 – ON – 10:00:04
Input0001 – OFF – 10:00:05
Input0001 – OFF – 10:00:06

Preferred Setup:

Input0001 – ON – 10:00:01
Input0001 – OFF – 10:00:05

Is this possible to do inside Rapidscada?
I am currently archiving to an PostgreSQL database.

Thanks in advance!

[Mikhail]

Hi,
Historical archives of the default type save data with fixed period.
To save data on change, enable PostgreSQL archives. They are disabled in the HelloWorld project. Archives can be found and configured in Instances – Default – Server – Archives.

[Mikhail]

> I am currently archiving to an PostgreSQL database.
If so, just configure the archive options.

[Mikhail]

Note that you need some intermediate points to draw a chart.

[TroyV23]

Thanks!

I will need up to seconds accuracy for the time-stamp of the status changes, how would I achieve that?

[Author]

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