Because you are converting a physical system to a virtual machine, the device-image type is the better choice.
由于您要将一个物理系统转换为一个虚拟机，因此device - image类型是最佳选择。
Choice primarily on the basis of PLC power output device type and the number of voltage levels may be.
选择时主要根据PLC输出设备的电源类型和电压等级的多少而定。
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