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Touchscreen FAQs

  1. What does the message, "PLC NOT RESPONDING(02:xx)" mean, and how do I fix it?
    • If this message is steady and not blinking, it indicates that there is no communication between the touchscreen and the controller. In this case you should check the cabling and communications settings of the touchscreen and the controller.
    • If the message is blinking or flickering, there is an incorrect tag associated with one of the screen's objects. For example, you may have set a numeric display tag to R9999 instead of R999, asking the touchscreen to display the value in register 9999, which does not exist in the controller. Invalid tags for the watchdog tag or panel trigger tag can also cause this same error.
  2. How do I adjust the screen contrast?

    Sometimes it is necessary to adjust the screen contrast. This can be accomplished by pressing both top corners of the touchscreen. A contrast selection bar will appear at the bottom of the screen. Touching the contrast choices on the bar will change the contrast. Different contrast settings can be used to adjust the screen for different viewing angles. When you are done adjusting the contrast, touch any area off the contrast bar to resume normal touchscreen operation. If you cannot find a suitable contrast setting, you may need to replace the bulb of the touchscreen. Contact This email address is being protected from spambots. You need JavaScript enabled to view it. for more information.

  3. My touchscreen locked up after an interrupted download. How do I fix it?

    If the touchscreen should lock up and not function when a partially completed download is interrupted, the touchscreen can be reset by initializing the touchscreen's memory. To do this, press one bottom corner and both top corners of the touchscreen simultaneously. This will cause a maintenance menu to appear at the bottom of the screen. Select the "OFFLINE" button on this menu and another menu will appear. This time select "INITIALIZE" and then "INITIALIZE MEM." You will be prompted for a password to initialize the memory. The password is "1101." Press "START" and when the intiialization is complete, you can exit out of the menus and proceed with downloading your project file.

  4. Can I create a button to do multiple functions?

    Most buttons that you can use in your QuickPanel designs can perform only one function. If you need to have a single button perform multiple functions, you can layer two or more buttons on top of each other so that when you press the top button on the touchscreen, the function of each of the buttons is performed. This enables you to change multiple registers or flags with one press of the touchscreen without having to write any additional Quickstep programming to perform the additional functions when the button is pressed. This is a useful shortcut in many applications.