The so-called "Driven Mode" of the Magnet Power Supply is to keep the switch heater leads connected to the magnet coils. A screenshot of when the magnet is in the Driven Mode is shown below (Notice that the Switch Heaters are connected).
Procedures
1. How to change the magnet from the Persistent Mode to the Driven Mode
2. How to change the magnet from the Driven Mode to the Persistent Mode