Modern processors have a special hardware facility, the Performance MonitorUnit (PMU), to collect the events related with the operations in the processor.
现代处理器具有一种特殊的硬件设施，即Performance Monitor Unit (PMU)。它用于收集与处理器中的操作相关的事件。
2
Relay box is an operational device to tripping and closing of breaker instructed by protection, breaker controlling unit, monitorunit, and auxiliary device of breaker.
操作箱的作用是用来完成保护、断控单元、测控单元、断路器辅助装置对断路器跳合闸操作的装置。
3
Host computer communicates with the monitorunit and the protection unit of LCUs through the CAN bus. PLC in LCU communicates with host computer through the RS-485 port.