The paper presents a software package for experiment planning on the Globus-M2 spherical tokamak, enabling the calculation of reachable plasma configurations while taking into account the electromagnetic system’s limitations. The reachable region is calculated using a linear plasma model with variable parameters under specified constraints on the voltages and currents in the poloidal magnetic field coils. The algorithm uses experimental discharge data and provides an interactive interface for the sequential evaluation of the reachable plasma shape.