Next step in creating a Solution is to connect to the running Unipi controller. In the Left panel on Solution tab, right click on the System and then click on the Add Controller.

The Find PLC dialogue will appear, in which we can specify, how the Mervis IDE should connect to the controller. If the PLC is in the same LAN network, you can use the UDP Broadcast and then click on Next.

Next window will show a progress bar as the Mervis IDE is looking for controllers on all network cards your computer has.

After the searching is finished, you will be presented with the list of detected PLCs. The target controller has its name displayed in the Platform tab. This tutorial used Patron S107 controller - in your case, choose whatever controller you are using and click on Next.

In some cases, you will see a red triangle next to the Runtime version. This means the runtime is older than the IDE expects. To fix this problem, follow the Updating runtime (RT) tutorial.

If you see a small skull next to the Runtime version, the controller's operating system is outdated and you need to upload a current version of Mervis OS. The guide for uploading Mervis OS for Patron, Neuron & 1.1/Lite and Axon

The last dialogue of the controller attaching process asks you about configuration download. The configuration holds basic settings of the Unipi controller, such as IP address, usernames and passwords, connections to Mervis DB and Mervis Proxy and so on. We always recommend downloading the configuration during the initial attachment.

The controller has now connected; in the left panel in Solution a new PLC will appear. Double-click on it. In the main panel a PLC tab will be displayed and the PLCs properties will appear in the Properties panel.