Modbus is the de facto standard when it comes to industrial connectivity in a multi-manufacturer automation environment. Modbus is an address-based protocol based on a traditional PLC. But with IEC-61131, register addresses are a foreign concept as IEC 61131 is strictly variable-based. What gives? In this session we’ll not only talk about how to implement Modbus with IEC 61131 – we’ll demonstrate it for you as well using the Horner OCS All-in-one Controller!