So, I dragged the datatype over to the Project Library. My desire was to connect this control to the datatype “udtStartStopPB” that I use in the “dbStartStop” datablock. ![]() After bringing the two buttons onto the HMI, I created a Faceplate based on them called “StartStopFaceplate”. The HMI control that I created is a Start-Stop HMI pushbutton control as seen below. The test project I created uses an S7-300 PLC and a Comfort Panel HMI. Creating these Faceplates was a great way to increase our productivity in development, and I would like to share one very important lesson that we learned in the process. ![]() Recently I was working on an S7-300 PLC project that required a fairly advanced HMI, so we chose the Comfort Panel to use Faceplates for the many pop-ups and identical controls required.
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