CTU


PLC-5 Counters

Introduction to PLC-5 Counters PLC-5 Counters count rung transitions. More specifically, the counters count the false to true transition. In the PLC-5, there are two types of counters: The Up Counter (CTU), and the Down Counter (CTD). While you won’t always see a CTD, it’s almost always associated with a Read More »

CTU and CTD