Create an alarm

Set up an alarm that watches a tag and raises a flag — its condition, priority, category, and timing.

An alarm watches a tag and becomes active when a condition is met — a temperature above a limit, a device that stops responding. This guide sets up a simple one.

Before you start

You’ll need the tag you want to watch (see Create a tag), and at least one alarm category — every alarm belongs to one. If you don’t have a category yet, create one first from Alarm categories (New, give it a name); categories also control who can see and acknowledge the alarm.

1. Add the alarm

In the project’s Alarms view, click New and choose Alarm. Then fill in:

• Name — starts filled in from the tag and condition; change it if you like.
• Priority — High, Medium, or Low. This drives how the alarm is sorted and surfaced in the Alarm manager.
• Category (required) — the category it belongs to.

2. Define the condition

An alarm is active when its condition holds. Add a condition and pick the type that fits what you’re watching:

• Number value — compare a numeric tag against a limit or another tag (e.g. supply temperature greater than 80).
• Boolean value — a true/false tag is in a given state.
• Bit value — a specific bit of an integer is set.
• Number of changes — a tag changes too often within a time window.
• Ping — a host stops responding.
• Planar range — two tags fall in/out of an allowed region.

For a number alarm you choose the source tag, an operator (greater than, less than, …), and a target — a fixed value or another tag. A deadband keeps it from flapping around the limit.

3. Tune the timing (optional)

To avoid nuisance alarms on brief spikes, set an Activation delay — the condition must hold that long before the alarm activates — and a Deactivation delay before it clears. Leave the alarm Enabled and click Create to save it.

The alarm now appears in the Alarms list and, once active, in the Alarm manager. To show it on a page, see Add an alarm indicator.