Re: [milo-dev] Support for Alarms in Milo Server?

[Kevin Herron <kevinherron@xxxxxxxxx>]

The bare minimum needed to sent Events is implemented, as you may have seen in the ExampleNamespace, but Alarms and Conditions are not implemented and not currently planned.

It should be possible to implement Alarms and Conditions yourself with probably considerable effort since it’s built on top of Event support.

I need to further look into the references you mentioned when I’m back from holiday and have access to my computer on the OPC UA specs. I think the HasCondition reference may simply be missing from the BuiltinReferenceType enum in Milo.

On Nov 25, 2021, at 23:31, Hermo Terblanche <hermot@xxxxxxxxxxx> wrote:



Hi,

I would like to know what the status is of Alarms and Events in Milo?

Is there support for automatic triggering of events for native OPC UA alarms such as NonExclusiveLimitAlarm?

I have used node-opcua and with minimal wiring was able to set up a source node and an alarm node, and the events trigger when I set the variable node's value.

Is this possible with Milo as well?

I managed to set up a similar address space in Milo as I have in node-opcua, but I cannot get the actual events to trigger.

Also I noticed in node-opcua that the relevant nodes have references like IsConditionOf and HasCondition, but I cannot get this set up in Milo, even when adding references. I have tried forward and inverse on both type of nodes, but to no avail.

Regards,

Hermo

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