To create connection with Micrologix 1400 you should create Allen Bradley server in TeslaSCADA IDE. To do this on Servers tab right click on the pane and choose Allen Bradley. In Server properties choose Micrologix Controller type and enter IP address of your PLC. Then you should create tags bind to this Server. To do this on Tags pane create tags and in settings choose your server in PV Input Server. To connect to your PLC you should start TeslaSCADA2 Runtime and open your project, then run it.
Best regards,
Ruslan