This is a network IP camera, the settings you adjusting, rs485, don't come into play at all.
If you can PTZ with the cams web interface, you simply need to use Find/Inspect in BI to add it.
I would delete this cam from BI, set the cam back to factory defaults, and start over from scratch.
Add the cam to BI, by entering it's IP address, and the user and password you assigned to the cam.
Then click Find/Inspect.