PLC Overview withApplication Example Figure 1 shows a basic process-control system building block. A processvariable, such as flow rate or gas concentration, is monitored via theinput module. The ...

In Part III of this series, we examined PLC programming methods (ladder logic and functional block diagram), and how the objects (coils and contacts) are system variables stored in the PLCs memory. We ...

Zornio pointed out that the two worlds of industry (process and discrete) are becoming more technologically close than they were 30 years ago. This reality is behind Emerson plan to bring PLC control ...