Modbus-Based SCADA/HMI Applications

This paper introduces design and implementation of Modbus-based supervisory control and data acquisition/human machine interface (SCADA/HMI) applications. In reaction to the severe problems such as incompatibility and complexity occurring in in the course of the selection of SCADA/HMI packet programs, controllers and instruments, a brief survey on SCADA programs produced by industrial automation vendors is presented and then two Modbus-based SCADA/HMI applications are designed and implemented via National Instrument (NI) Lookout program. Thus, obligation in harmony with same vendor’s industrial automation products is eliminated for any SCADA/HMI system. In this study, Modbus-based SCADA/HMI applications have been developed using frequency-controlled inverter, programmable logic controller, and NI Lookout program in order to meet industrial and educational application needs.