  MEDICYC (MEDical CYClotron) is an isochronous cyclotron dedicated to
radiotherapy which was built and commissioned in Nice, France, in 1990 by a
local team aided by experts from CERN. The cyclotron accelerates negative H to
a maximum energy of 65 MeV and uses stripping to extract a proton beam. Its
primary purpose is treating ocular melanoma by protontherapy but a significant
research activity is also present on beam-lines dedicated for this purpose. An
extensive refurbishment program of the cyclotron has been started to cope with
the end-of-life and/or the obsolescence of several sub-systems. In this
context, a new high-level cyclotron control system has been developed and
commissioned in 2021-2024. The primary responsibility of the system is the
high-level coordination of the source, the RF system, the beam-line and
cyclotron magnets, to produce and deliver a beam with a given set of
characteristics. A secondary responsibility is the collection, visualization
and analysis of sub-system and beam data for monitoring and pre-emptive fault
detection. In this contribution, the control system software architecture is
presented and the infrastructure on which the systems are deployed is laid out.
