Modernizing the RF control systems at the Advanced Photon Source

The Advanced Photon Source (APS) recently completed a significant upgrade to its storage ring, replacing all existing components with new ones. However, the RF systems and their control mechanisms were not part of this upgrade. The APS operates four RF systems: the Linac, the Particle Accumulator Ring (PAR), the Booster Ring, and the Storage Ring. These systems have traditionally relied on analog controls utilizing a combination of VME/VXI and Allen-Bradley PLC5 hardware, which are now obsolete. This paper discusses the ongoing transition to digital controls, the integration of new RF hardware, and the progress achieved thus far.