This unique text was designed either as a stand-alone study guide in programmable controllers, or to accompany Programmable Controllers Theory and Implementation as a workbook. As a study guide, this book enables practicing professionals to refresh their memories and sharpen their skills in traditional and cutting-edge PLC technologies. As a workbook, the text can be used to reinforce the information presented in Programmable Controllers Theory and Implementation, beginning with the principles of PLC operation and culminating with the selection of the right programmable controller for an application. Used in either manner, Programmable Controllers Workbook and Study Guide provides valuable insight into current industrial automation technology.