CC-PAIH01 51405038-175可控硅

产品标题: CC-PAIH01 51405038-175可控硅模块

型号： CC-PAIH01 51405038-175

品牌： 霍尼韦尔

                                                                                 产品详情资料：

使系统故障时处于状态

　　DCS系统本身在工作中不断地进行在线故障检测，一旦发现故障，就将故障设备与系统隔离，使它不至于影响其他设备的正常运行。故障出现后同时会发出声光报警，维护人员根据报警的提示进行分析故障原因并尽快的处理故障，避免故障扩大。在处理过程中要做好现场的技术措施，不要轻易重启CPU，以免对设备造成扰动。

　　如果需要重启CPU，需要与操作人员配合做好预防措施，一般DCS在CPU复位时会对模拟量输出信号进行复位，这样可以对执行器和变频器采用手动切换控制方式，执行器也可以采用断电方式或将模拟量输出卡件拔掉方式(执行器具有断信号保持功能)，系统正常后将信号加到正常值后再给执行器上电和插卡件。但是要根据DCS本身的特点进行，有的设计中有开关量输出(开、关、保持等)，如果用户在组态时选的输出是开，那当重启CPU后开关量会发出开的指令。

                          产品英文详情资料：

Put the system in a safe state when it malfunctions

The DCS system itself continuously conducts online fault detection during operation. Once a fault is detected, the faulty equipment is isolated from the system to prevent it from affecting the normal operation of other equipment. After a fault occurs, an audible and visual alarm will be issued. Maintenance personnel will analyze the cause of the fault based on the alarm prompts and promptly handle the fault to avoid its expansion. During the processing, on-site technical measures should be taken and the CPU should not be easily restarted to avoid causing disturbance to the equipment.

If it is necessary to restart the CPU, it is necessary to cooperate with the operator to take preventive measures. Generally, DCS will reset the analog output signal during CPU reset, which can manually switch the control mode between the actuator and frequency converter. The actuator can also be powered off or the analog output card can be unplugged (the actuator has the function of keeping the signal off), After the system is normal, add the signal to the normal value before powering on the actuator and inserting the card. But it must be based on the characteristics of DCS itself. Some designs have switch safety outputs (on, off, hold, etc.). If the user selects the safety output as on during configuration, the switch will issue an on command after restarting the CPU.

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