# The first live value

> The walk from an empty Connector to a tag that reads: the driver, the device, the tag, the first poll, and the Logic address the value gets.

1. Open **Connector** on the rail. The column on the left is called Communication; its first row, **Drivers**, lists every driver the package ships. Open it and make sure the driver you need is enabled; for a first try, the built-in **Simulated** driver needs no hardware. See [Drivers](connector-drivers).
2. Select the driver in the tree and press **Add device** on its page (a driver that can find equipment also offers **Discover**). The device's card takes a **Name**, a **Poll interval (ms)** and the connection fields the driver needs; every field saves as you leave it. See [Devices](connector-devices).
3. On the device page, press **Add tag** on the Tags card. The new row takes a name, the address the driver expects on the device, a data type and an access; the tag joins the grid and the tree.
4. The embedded runtime connects in the background and starts polling. Until the device answers, the status bar's health reads "Connector: *device* not communicating" in red and the device counts under the Issues chip of the Connector column; an unreachable device costs nothing else, its tags read bad quality until the connection lands.
5. Select the tag. Its page shows the **Live value** card (the current value, the source timestamp and the application timestamp), and the Conversion card explains how the raw reading became the engineering value. See [Tags](connector-tags) and [The value pipeline](connector-value-pipeline).

That value now has a Logic address, `Connector.<Driver>.<Device>.<Tag>` (with a folder segment for a device filed in a folder), and is ready to be shown on a dashboard, read from an expression in Logic, or bound to a channel of a Process model. Other OPC UA clients read it once you let them in: the embedded server starts with **Client authentication** set to **Disabled**, which refuses every outside session, so pick **Anonymous** or **Username & password** under [Settings, OPC UA server, Configuration](settings-opcua-configuration) before pointing a client at it.