HL-2A的中央逻辑控制PLC环网设计

PLC逻辑控制是HL-2A中央控制系统的重要组成部分，改造前的逻辑控制系统基本使用硬连接，维护耗时耗力。结合新一代实时工业以太网PROFINET为HL-2A逻辑控制系统的改造设计了环形冗余网络。采用8台西门子交换机SCALANCE X200通过光纤依次连接成环，交换机的电口连接S7-400和上位机，与等离子体放电相关的重要信号仍走硬连接，其他所有信号都走网络传送。中控系统作为管理站对其他7个子系统进行集中化管理，中控可以轻松快速地获取每个子系统的状态，在等离子体放电错误时能很快的预测事故地点和故障分析。根据放电实验结果表明，光纤环网非常适用于设备分散的慢控制系统，整个控制系统逻辑关系清楚，后期扩展和改造也非常方便。改造后的逻辑控制系统能满足HL-2A和HL-2M两套装置的慢控制，维护简便，事故定位快准，提高了放电效率。

The Ring Network for PLC Control System on HL-2A

PLC logical system is an indispensable part of centre control system on HL-2A Tokamak. According to the HL-2A control plan for the logic control part of the requirements, a PLC Optical Fiber Ring Network has been designed and introduced to PLC logic control system on HL-2A. The real-time data communication platform is built for HL-2A logical control system through the application of a new generation real-time Ethernet PROFINET, important signals related to the discharge using the point-to-point connections, other signals using network transmission. Central control makes centralized management for other subsystems, the whole control system logic is clear and makes operation more convenient and makes the ability of forecast and accident diagnose disposal more powerful and quickly during the plasma discharge. It greatly makes the whole control system management easy and protect the latter research investment.