How wireless programmer logic controller (PLC) works in automation network?
Several major manufacturers (Rockwell and Siemens are the two biggest) have been putting remote I/O on Ethernet for some time. In the last few years, industrial wireless hardware has become available from a variety of sources that allows the I/O to be connected to the network without wires The PLC controllers themselves have had Ethernet capability for many years now. A typical factory automation system is composed of several network “layers” each connected through firewalls and routers Internet – the outside world Router – controls Internet access The office layer – connects office PCs together and allows internet access Router- Controls access to the SCADA system – only specific PCs in the Office layer can pass down through the firewall. Controls uplinks as well. Internet access is very restricted, if allowed at all SCADA layer – Supervisory Control and Data Acquisition systems layer.- As PLC’s become more powerful, many smaller systems dispense with this layer. In large complex plan
