It is shown by theory and case study that the master - slave clock mode in a com munication system is ideal for proper functions of the current differential protection.

理论及实例分析表明，通信系统的主—从时钟方式是电流差动保护装置在复用数字通信系统时正确工作的理想方式。

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First, aiming at the distribution of NCS, specially the multi-master system such as CAN, there is no unified network clock, so the scheduling and management are affected.

首先针对网络控制系统分布式的特点，特别是类似于CAN总线的多主系统，由于没有单一的时钟提供同步机制，影响调度管理的同步。

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