The fastest way to test the VC OPC UA < – > KepServer connection is by doing it anonymously i.e. setting security requirement to [None], but there is a option somewhere deep down in the Properties of the KepServer running program(it’s called Project) if you don’t set it right then you won’t be able to connect to KepServer anonymously. See Below:
Project – > Property(Right Click) – > Allow anonymous login – > [Yes].
Also see the attached short video for more info. Remember to re-initialize the KepServer run-time every time you make any changes.