在 HIMM 医用重离子加速器（Heavy Ion Medical Machine）中，回旋加速器的连锁保护功能针对离子源、高频、真空、电源、冷却水等子系统的连锁要求，设计实现了设备+PLC+软件三层结构的连锁系统，并保证连锁功能在系统断电、线缆连接故障、数据传输异常等情况下的正常工作。连锁系统可实现硬连锁毫秒级、软连锁次秒级别的反应速度。整体功能在回旋调试过程中得到验证，保障了整个加速器的顺利供束。%This article mainly describes the interlock protection function design in the cyclotron control system of HIMM (Heavy Ion Medical Machine).Aiming at the interlock requirements of ion source,radio frequency,vacuum,power supply, cooling water and other subsystems,we designed an interlock system based on device+PLC+software structure.This design en-sures the normal work of interlock function in case of power down,line connection failure or abnormal data transmission.The re-action time reached milliseconds for hardware interlock and sub-second for software interlock.The whole function was verified in the process of cyclotron testing and ensured the beam tuning of the whole accelerator.
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