We can use TwinCAT TF6620 to implement the communication between Siemens PLC. TwinCAT System will use the IO Configuration and library that is supported by Beckhoff. And also, Only Absolute Address in S7 CPU is possible in this operation. System Requirment Manual Installation Please access this link and click on the Software and tools tab. Download the latest version. Please choose english. Press Next. Agree the License and press next. … Continue reading Beckhoff#TwinCAT3 TF6620 S7Communication_Part1