C-More Micro HMI -- How To Change Screen Contrast for touch screen display for PLC

There are three ways to adjust the screen contrast. Method 1: Use the Adjust Contrast Object: Simply by using the adjust contrast object you can let the user change the contrast on the fly. Unfortunately, the simulator doesn’t show contrast changes, but the number at the top of the control is the current contrast setting. 5 is the darkest, 1 is the lightest – again the simulator doesn’t show those changes. To do that, just double click or drag the “Adjust Contrast” object onto the screen, specify a text color, text size, which function keys you want to use for contrast change – if you want to use them, you don’t have to and you are set and ready to go. Adjust the size of the object, place it where you want, and simulate it. We’ve already seen that so we are not going to do that here. Note that this method only temporarily changes the contrast – when you power cycle the unit, the setting goes away. Method 2: Assign the menu key on the keypad bezel to bring up the Setup Menu. Like this. Theres a whole video on how to setup the menu key to bring up this setup menu, so see that video for more information on that. But here is a little hint: it is right here under Navigation windows Function Tab - Bezel Menu Key Setup … Once you have set that up, pressing the Menu key takes you to that setup menu – and in the setup menu you simply go to settings, LCD Contrast. Touching the touch screen cycles through the various contrast levels, OR you can use the function keys, OR you can use the arrow keys. This method of changing the contrast is permanent – it survives power cycles and it will stay at that contrast setting until you change it. Method #3: Press and hold F1 and F5 keys at the same time and hold for 5 seconds to bring up the Setup menu and repeat the same steps we just did. You can simulate that on the simulator by right clicking and selecting Go To Setup Menu. That does the same thing as holding down F1 an dF5 at the same time. That’s all there is to changing screen contrast – be sure to check out the other videos in this series. And as always, please send us any topics you would like to see covered – or - any other comments for that matter – we appreciate the feedback!