踩坑实录:Python对西门子PLC(S7-200_SMART)寄存器的读写(VB区)
https://blog.csdn.net/holyyy/article/details/103088206
Python通过S7协议与S7-1200通信实现
https://www.codenong.com/cs106530161/
Raspberry Pi Communicating with S7-200 snap7 python
https://www.youtube.com/watch?v=ZdtXgbg9Uqw