From tore Supra to WEST: Evolution of the CODAC infrastructure

•Technical upgrade of the former Tore Supra CODAC architecture.•Technical solution for improving performance and simplifying maintenance.•Maintain backward compatibility with former architecture.•Provide cost- and time-effective solution to maintain operation. In 2013 Tore Supra limiter tokamak at CEA Cadarache went through major changes to become the WEST tokamak (Tungsten [W] Environment in Steady state Tokamak). The tokamak was upgraded into an X point divertor device. Taking advantage of its long discharge capability, WEST's goal is to minimize technological and operational risks of the actively cooled tungsten divertor for ITER. At the same time, Control Data Access and Communication (CODAC) system has been redesigned in order to satisfy the performance and evolutions needed by researchers, and to facilitate maintenance and evolution for the CODAC team. This paper describes the upgrade of the CODAC system from Tore Supra to WEST.