Schedule email alerts when node is updated

Hey, I'm new to Drupal and am probably asking something which is very simple.

I need to set up a rule that will schedule an email to send to an author after six months if no further revisions have been made asking them to check their page.

I have set a rule that has an action 'Schedule component evaluation' which points to a component I have created that will simply send an email, the date is offset by six months.

This runs fine but I don't know how to pass the node id to the component that gets called in six months.

Are there any tutorials on this that someone could recommend?

Thanks

Scott