【摘要】 在水电站工业自动化控制中,针对现场高可靠性应用场合,PLC系统往往采用双I/O冗余输入输出。双I/O冗余输入输出不能简单地直接串并联,必须根据信号的类型、信号等级、输入输出方式不同,分别解决。对于模拟量输出冗余还应注意切换过程的扰动情况。更多还原

【Abstract】 In the application of the high reliable control projects of hydropower station, the dual I/O PLC control method is normally adopted. Dual I/O signals can not be connected simply in series or parallel. Different kinds of signal have different solutions. Special attention must be paid to the switch of dual analog output signals for the potential switch disturbance.更多还原