Calculation Server

Asset-Based Calculations with Output to Multiple Tags

Hi all, I’m working on setting up asset-based calculations in Canary and could use some guidance. My goal: Apply the same 5m calculation (e.g. 5-minute average of Real Power) across multiple assets…

Interpolated Bounding Values using SteppedInterpolation

Hi Everyone I know that Canary can do Simple Bounding and Interpolated Bounding when it's aggregate some time series. I supuse that it use SlopedInterpolation method (described by the OPC Foundation…

Time Since False

I've got a use case where I want to keep a running timer of how long a piece of equipment has been off. There is a tag for status: 1 = running, 0 = off.…

Count Number of Changes in String Tag value

We are doing a thruput improvement project and trying to find a way to calculate how many serialized units move thru our workcells. The most robust signal we have to track this with currently is a…

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Calcs and Events - Latch value

I have a complex event trigger that I am having difficulty programming. I have a trigger that when the length has been reset (Previous length > current length - which we'll call A) and then the…

Send reminder emails with Calcs & Events service

I have a system which contains water quality sensors that will tell the process engineers when water filters need to be changed. I have set up email alerts to notify them when the water quality meets…

Use an attribute of a parent asset in a calculation

I need to reference the value of an attribute in a parent asset in my calculation. For this example I'm trying to calculation the contribution of the current element towards the total of all the…

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CanaryAnd, and, &&, &

As far as I can tell, there are at least 4 ways to do an AND operation in Calculation: CanaryAnd, and, &&, &. Similarly for OR (CanaryOr, or, ||, |). And not equal has != and <>.…

Time a bool is true!!

V23 User I have a machine status, if true, the machine is productive, false if not productive. I want to periodically calculate the percentage of the current day the bool is true or machine is…

Count Daily events

I have a system with a tag that produces 3 values: UP DOWN NoData And I want to count the number of times (within a day) the tag value switches from UP to DOWN or from NoData to UP.…

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Rollup calculation syntax

I'm trying to create a rollup calculation but I don't really understand he syntax and I can't find any examples. I have a virtual view with these asset types: one Company, with multiple Sites,…

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Quality of PreviousValue

Is there a way to get the quality of the PreviousValue of a tag in Calc and Events. I try to use Quality('PreviousValue('[tag]')'), but I get an error for this.

Backfill To vs Remove Old Data

How are Backfill To and Remove Old Data related? Below are the definitions from the documentation. So Backfill To will be leveraged anytime the calc is saved or the calc service is started up?…

Calculations stuck in Backfilling

I have several calculations that are stuck in 'Backfilling' and never go to Live Mode. This obviously means calculations that depend on them can't start.…

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Parent-Child Assets and Calculations

Hi Everyone, I need to understand how to create rules for parent-child relationships between assets. I can't find any useful examples in the documentation, forums, or on YouTube.…

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Bulk remove Calculations

Is there an easy way to remove multiple Calculations at once? Or is the only way to click delete on each one individually?

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Date/time arithmetic in Calculations

Apologies if this is a silly question or if I'm repeating something I've already asked (I'm sure I asked something like this a while ago) but what is the best way to do date and time arithmetic in…

A tag that's value is the year data started

This is related to not being able to manually create tags. For filtering reasons in Axiom, I want to be able to have a tag that's value is the year the tags were added (i.e.…

Date & time functions in calculations

I'm trying to calculate approximate sunrise/sunset times for each day of the year for a solar generation application. I have them worked out in Excel and need to transfer the calculations to Canary.…

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Simple calculation. Don't understand where the results go

I'm new to Canary and trying to understand how the asset model and calculations work. I've got Solar PV data coming in for 2 inverters with a number of strings of panels on each inverter.…

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