Communication between the intouch 7.0 and plc simatic S7-200

摘要

Main topic of the poste is the commjnication between PCL Simatic S7 200 and SCADA system Intouchn 7.0 via serial link RS 485. On side of the PLC is used freeport communication mode with our own protoco. The interface between PLC and Intouch is made by conversio program that use Dynamic Data Exchanges (DDE). This makes possible with keeping protocol to communicate with other types of PLC's too. In this manner is also possible to build a communication between several nodes.