TF6620 TwinCAT 3 S7 Communication Manual

This document provides a comprehensive guide for installing, configuring, and using the TwinCAT 3 S7 Communication (TF6620) product to enable communication between Beckhoff TwinCAT systems and Siemens S7 PLCs. It covers system requirements, licensing, technical introductions (including mapping, PLC libraries, and symbol server interfaces), and a detailed PLC API reference for function blocks and data types.