初始状态指令的功能是自动设置初始状态和特殊辅助继电器。
The original state instruction functions are to set automatically original state and the special auxiliary relay.
请求周期会经历若干状态并会根据当前状态向请求周期处理器发出不同的指令。
The request cycle goes through several states and, depending on the current state, sends different instructions to the request cycle processor.
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