Questions & Answers Category

Pulling Values with Bad Quality (0X00)

From what we have tested when we pull values that have a bad quality, they return null either through the read API or axiom. When looking at it through the views I can see it has a value,…

Axiom List Box Script to Show/Hide Trend Graph Trend

Good Day All, I have an internal customer who would like a list box populated with predefined selections. Based on whether they are selected or not, will determine if they are shown in a trend graph.…

Does Canary recalculate after old data comes in?

I'm pretty sure the answer is no. But I wanted to confirm for a customer. The customer has a calculated tag (runs when any inputs are updated) that is flow rate time product concentration.…

Excel Add-In not Fully Installing V26.3

Good Day All, I have an internal customer that would like to leverage the Excel Add-In. The Canary install process went through without throwing any errors, no log entries.…

How to send a subset of tags from one Canary historian to another

Hello, I was wondering what the best practice is for a hypothetical scenario: A plant has a subset of Canary tags they'd like to share with a partner who also has their own Canary historian.…

Error when opening Axiom applications containing Spark Charts

Hi, Our applications that contain Spark Charts often but not always, have the attached error pop-up and the application page doesn't load correctly. If the browser page is refreshed,…

V26.5 OPC UA session/group tag limits

I was experiencing the same OPC UA collector UI performance issues described here. V26.5 is a HUGE improvement to my current workflows. Please pass on my thanks to the dev team.…

• Answered

Exporting tags from Axiom Trend Groups

Same as the title, how to export tags from axiom trend groups without data? Is there a config file which stores this information that can be accessed rather than manually browsing the trend groups…

• Answered

Regex Modifiers

I was traipsing through a Canary system I inherited and found a Model Rule with a match field of (?i)##1$ I did not know you could do regex flags like that! Can you use any of the .…

Install Publisher service on dedicated server?

Can the Publisher service be installed on a dedicated server and if so are there any licensing impacts? I'm sure it depends how many sessions are configured,…

• Answered

Bar Chart Question! V25.5

How do I configure a bar chart to only show the current values of the selected tags? I'm thinking a special combination of AggregateInterval, AggregateKind, TimeDuration, and TimeStart.…

Backfill to roll-over hdb3 files

I'm trying to backfill a year's worth of data for about 30k tags across two datasets using the gRPC write API extension methods. I'd like to backfill these into two new backfill datasets with daily…

• Answered

0 Time Event

This might be the wrong question, but is there a way to create an event that is 0 seconds long? Background - we have a use case where valves can direct product to one of 4 tanks.…

Merge Tags at file level

Is it possible to merge history (within the same dataset) by adding new hdb3 file to the data set? I see tags can be merged at the Views level which is a great option in many scenarios: https:…

Multistate Tags using metadata properties

Could I please get some more details around the options for multistate tags (enums): ie 0=Off, 1=On, 2=Disabled, 3=Emergency stopped I see Axiom has a State Drawing mode for a tag - is it possible to…

How does DurationSinceLastTVQ resolve the 'last TVQ' in periodic/subscription Event jobs?

Is there any documentation that explains exactly how DurationSinceLastTVQ determines the `last TVQ` when used in periodic or subscription Calculation/Event jobs?…

Store and Forward - Change buffer location

Is it possible to change the buffer and other SaF locations? On many servers the client wants to avoid buffered data on the system drive (C:) incase it fills up and crashes the server.…

Licensing — Dual Historian (Both Historizing) with SaF Proxy Forwarding

My client wants to add a local Canary instance to their site and I have a question on licensing, license configurations and Historian Configuration. They were led to believe they do not need any…

• Answered

Axiom Displays - Move to a new Server

Hi There, I have a client deploying a new Canary Server (local instance) and they want to copy/move the Axiom displays that were created on the off-prem Canary Server.…

Error loading Sender UI

Hello community! After configuring the Sender, when I navigate to the Sender UI, I get "Something went wrong". This happens with both the HTTP and HTTPS endpoints.…

AXIOM - Unexpected exception occurred. Value cannot be null

Hello, A few days ago, this error message started appearing in some of our Axiom applications, where I display value boxes with conditions (an “if” equation in a calculate control) that depend on the…

File automatic removal after CSV collector does its job.

After saving data to historian through CSV collector, the completed CSV files are automatically moved into 'Completed' folder. I'm wondering if there are any Canary built-in features I can use for…

Kepware Server Configuration

Has anyone setup Collector to read tags from Kepware Server OPC UA?