The following project is an update of Gary D. Patterson’s “Simplified CTC signals” in the July 1988 issue of MR. Bringing the project up to date was a large endeavour. The block control project now ...

The Arduino PLC IDE permits users to program in the five languages defined by the IEC 61131-3 standard: ladder diagram (LD), function block diagram (FBD), sequential function chart (SFC), structured ...

The purpose of this project is to demonstrate process control by creating a 4-story elevator. The elevator cab rests on the first floor and waits for either an elevator call or a floor call. When the ...