McHelperReadRandom 方法

随机读取PLC的数据信息，可以跨地址，跨类型组合，但是每个地址只能读取一个word，也就是2个字节的内容。收到结果后，需要自行解析数据
Randomly read PLC data information, which can be combined across addresses and types, but each address can only read one word, which is the content of 2 bytes. After receiving the results, you need to parse the data yourself

使用块读取PLC的数据信息，可以跨地址，跨类型组合，每个地址是任意的长度。收到结果后，需要自行解析数据，目前只支持字地址，比如D区，W区，R区，不支持X，Y，M，B，L等等
Read the data information of the PLC randomly. It can be combined across addresses and types. Each address is of any length. After receiving the results, you need to parse the data yourself. Currently, only word addresses are supported, such as D area, W area, R area. X, Y, M, B, L, etc