MasterLogic PLC MasterLogic Programmable Logic Controller (PLC) is a modular, scalable rack-based industrial controller delivering powerful performance in a control application. What Is It? MasterLogic PLC is a pocket-sized industrial logic controller powered by a high-speed processor. It can operate in a standalone manner, in a peer-to-peer environment, or in a SCADA topology with Experion® HS. It features a wide range of components (the CPU, power supplies, discrete and