Animation of rope revolving

I am having an issue with animation of a rope revolving around a log. I have tried many plugins. I use a section plain to animate the spinning of the circle portion using keyframe animation. I only want 1/2 of the image turning. No problem.
Though, now when I need to incorporate the straight rope section, the section plain blocks me from putting anything behind it. I need to isolate the section plain to it own layer, and be able to create scenes which are not effected by it.