Understanding the S7COMM and Modbus Industrial Protocols
First published on Xianzhi: https://xz.aliyun.com/t/6603 0x01 S7COMM S7COMM stands for S7 Communication. It is Siemens' proprietary protocol for programming and data exchange between S7-300/400 PLCs. S7 is carried over TPKT and ISO-COTP; this article focuses on S7Comm…