This paper discusses the system developed to control the 2 MW 23 MHz RF system at TRIUMF. Included are means of pulsing through the multipactoring region; RF accelerating voltage amplitude and phase control; provision of self‐excited and driven modes of operation; fine tuning of the resonators; phase and amplitude control of third harmonic voltage for flat‐topping of the RF waveform. Results obtained with a prototype control system on the central region cyclotron are included.