SCADA systems can now connect to Siemens PLCs via the Ignition OPC-UA Server. The Ignition Siemens Drivers Module includes three drivers that enable communications with Siemens S7-300, S7-400, and ...

Tutorial: DNP3 - SCADA, Clear and Simple DNP3 was developed in the early 1990s to include all functionality found in the hundreds of proprietary protocols in use at that time.