A novel architecture in power supply control system at NSLS-II is discussed. The architecture provides a synchronous, deterministic and fault tolerant communication protocol for power supply control system. The architecture is designed to be able to achieve NSLS-II power supply control tasks. It also fits well into the general architecture of fast orbit feedback system and slow orbit feedback system. At NSLS-II, all the power supplies (including dipole magnet power supplies, multipole magnet power supplies and corrector magnets power supplies) will be controlled using this same architecture.