![]() Each one of these fault states is being displayed by an LED directly on the electrical panel. It may stop due to a lack of maintenance (low oil level), unforeseen breakdown (jam at the infeed), or an operator mistake (safety door opened). ![]() Imagine that the same grinding machine is capable of faulting out. Therefore, the HMI could be used to convey this information to the operator and allow him to make better decisions with regards to the process. ![]() However, a PLC could pull a lot more information from this machine, depending on the needs of the operation. An HMI could be created to give a visual indication of the current status of the machine: stopped or running. Imagine for a second that you have a grinding machine that you may start and stop with the press of either button. The most basic HMI will allow the operator to see the current status of a particular process. HMI Functionality | Basics and Advanced Features
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