Ford has included logic for elevated idle control in the powertrain control module (PCM) since the 2005 model year. It's called the stationary elevated engine idle speed control system (SEIC). But you have to hook it up to make it work.
The SEIC is not just for power take off control. It's also used to elevate the idle RPM for battery charge protection, or for extended idling in hot or cold weather so the heater/ventilation/air conditioner (HVAC) systems will do a better job.
Here is a link to Ford's procedures for how to install the bits and pieces to make the SEIC work in a 2008 SuperDuty truck:
https://www.fleet.ford.com/truckBBAS...tml/Q162R1.pdf
