We had a similar issue on a project for a system of TV screens to display web pages. Other than gretting IT to adjust the settings for when it went to sleep, the qucikest way we found to get around it (NOT RECOMMENDED THOUGH), was to have a powerpoint presentation goign through a slideshow. But as the guys above mentioned, if there is any requirement to interact with objects on screen that could cause problems.
A truly horrible suggestion and RECOMMENDED EVEN LESS would be to remote into the resource, then run the robot and manually move the mouse around every few minutes.
These are all universally bad ideas from a security/operational perspective, best course of action is to get IT involved. With RPA you really need IT on board and a willing partner. You might use this as an opportunity to streamline requests like this, set up a template, improve working relationship with IT department etc. Without IT support, later RPA projects will run into similar little problems and they will take ages to get around without IT making a sqift intervention.
But then again i imagine you know all of this already! apologies, haven't had my coffee yet!
good luck with this mate 🙂