A tokamak plasma discharge involves a series of complex and concerted actions conducted by its control system. The HL-2A control system can be divided into two partst, the machine control system and the discharge control system. The machine control system, which consists of industrial PC (IPC), configures and operates the tokamak' s various technical subsystems. Timing sys-tem is integrated into machine control system giving absolute time for all subsystems. The discharge control system,
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