例如，在驱动程序与硬件进行通信时，它操纵寄存器以便请求一些所需的设备操作。
For example, when a driver communicates with hardware, it manipulates registers to request some desired operation of the device.
针对有效值限制测试由前面的寄存器地址请求返回的值。
Test the values returned by the preceding register address request against valid value limits.
底层网络包的数据或消息区域封装了一个请求命令，它请求设备中包含设备信号数据的寄存器的内容。
A request command is enclosed in the data or message section of the underlying network packet. It requests the contents of registers in the device containing signal data of a device.
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