等到连接恢复时，就可以重新打开HADR，而备用系统将与主系统通信，并执行“catch - up”操作，直到它返回到同步状态。
Once connectivity is restored, you can turn HADR back on and the standby will communicate with the primary and perform "catch-up" operations until it returns to a synchronized state.
在分析了数控系统通信网络结构和通信特点的基础上，提出了一种新的现场总线时钟同步协议。
Based on the analysis of nc system's communication net architecture and characteristics, a new time synchronization protocol was proposed.
在分析了数控系统通信网络结构和通信特点的基础上，提出了一种新的现场总线时钟同步协议。
Based on the analysis of nc system's communication net architecture and characteristics, a new time synchronization protocol was proposed.
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