Contents PROGRAMMABLE LOGIC CONTROLLERS PLC HARDWARE 3.1 LOGICAL SENSORS 4.1 LOGICAL ACTUATORS 5.1 BOOLEAN LOGIC DESIGN 6.1 KARNAUGH MAPS 7.1 PLC OPERATION 8.1 LATCHES, TIMERS, COUNTERS AND MORE 9.1 STRUCTURED LOGIC DESIGN 10.1 &….. PREFACE <TODO> Some sections are still in point form. The last major task of this book will be to write the preface to reflect the book contents and all of the features. Control systems apply artificial means to change the behavior of a system. The type of control problem often determines the type of control system that can be used. Each controller will be designed to meet a specific objective. The major types of control are shown in Figure 1.1.