Programming for slidinig window monitoring in ION9000

[ericmkchan]

Hi there,

There's a requirement of monitoring whether the number of voltage fluctuation (in a 1-hour duration) beyond a setpoint.  And such monitoring is in sliding window:

e.g.

at 14:00 to monitor the period between 13:00 and 14:00;

at 14:02 to monitor the period between 13:02 and 14:02;

at 14:04 to monitor the period between 13:04 and 14:04;...etc

In order to do so, under the current ION7650, this is leveraged by using the capability of Arithmetic Module's memory but which is limited to 10 previous records.  Meaning that it can only be measured in every 6 minutes.

Given that there will be an upgrade from ION7650 to ION9000 onsite, may I ask whether this advanced model ION9000 have higher capability to memorize more historical records under Arithmetic Module so as to improve the resolution for said monitoring?

(Of course that would be extremely appreciated if there are any other way(s) to accomplish the sliding window monitoring requirement)

Cheers

[Charles_Murison]

Hello @ericmkchan ,

Where is the data about the number of voltage fluctuations coming from? A counting module? 
I am not sure if the Arithmetic module previous records has changed. Have you considered looking into what store modules can do for you?

Regards,

Charles

[DanL]

Are you looking to take the average number of events per hour updated on a sliding 2 minute window?
The SlidingWindowDemand modules are still limited to 15 sub-intervals, so alone it can only produce a 30 minute average updated every 2 minutes. It could produce a 60minute average that updates every 4 minutes if that is acceptable (better than 6 minutes)?

https://www.productinfo.schneider-electric.com/ion9000/595e26f146e0fb0001f6ffc4/IONReference/English...

The ION9000 firmware still supports 10 previous input values for all 16 ART inputs. It also supports one previous result output for each output.

[Hal_Etheridge · Accepted solution]

Maybe use multiple ART modules chained together?

Each ART module would store the previous 10 values and output two values:  the sum of those 10 values and the oldest value of the 10.  The oldest value is then linked to an input of another ART module to repeat the process.

For your application this means 6 ART modules are required each managing 10 sub-intervals.  Finally another ART module would take each of the 10 minute ART sub-interval modules (6 total) and sum them to generate the overall 60 interval summation that could then be displayed on the front panel, etc.

I think this should give you the results you are looking for over the larger interval that a single SWD module but at the expense of extra complexity.

[Charles_Murison]

Hello @ericmkchan ,

Did any of the options mentioned help you? If so, please consider marking the post as such.

Regards,

Charles