第二层联锁机采用可编程控制器（PLC）S7-300。
Theprogrammable controller (PLC) S7-300 is applied in the second layer.
顺序控制系统(SCS)是用于辅机联锁保护的一种较为先进的控制手段。
The sequence control system (SCS) is a kind of relatively advanced control measures used for interlock protection of auxiliaries in power plant.
操作表示机是计算机联锁系统中关键的人机界面设备，硬件上利用继电器组成的逻辑电路，实现双机热备的倒机逻辑控制和设备接口电缆的动态切换。
Therefore it is necessary to perfect the existing relay equipment based on the rule of fault-safety in order to achieve the function of railway signal computer-based interlocking control system.
介绍了ACS800直接转矩控制变频器在3400/250三叠网多缸纸机负荷分配中的应用，就通讯、联锁、参数设置及使用中的注意事项等问题进行了讨论。
In this paper, the application of ACS800'S DTC inverter in load distribution of 3400/250 three wire multi-cylinder paper machine is introduced.
介绍了ACS800直接转矩控制变频器在3400/250三叠网多缸纸机负荷分配中的应用，就通讯、联锁、参数设置及使用中的注意事项等问题进行了讨论。
In this paper, the application of ACS800'S DTC inverter in load distribution of 3400/250 three wire multi-cylinder paper machine is introduced.
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