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A Human-Machine Interface or HMI is the apparatus which presents process data to a human operator, and through this, the human operator, monitors and controls the process. It consists of custom controls and modules which make it easy to configure the control system by simply dropping controls on VB forms, and changing properties of those controls to define how the application will interact with the control hardware on the machine. The custom controls included in the system handle the following types of functions: Manual, Automatic, Time, Temp, Adjust Setup, and Reporting. The control system is made up of a computer, a PLC, and a servo sub system. Most machine control I/O (Input/Output) is done through the PLC. This PLC can be a Siemens, Allen Bradley, Omron, or GE PLC. The software in the computer specifies the memory locations and timers used to interact with the logic running in the PLC. |
