Sparkyinak (Customer) asked a question.

February 4, 2024 at 10:25 PM
Limiting Access to EA3-S3ML-RN screens

Hi,

I would like to temporarily prevent access to some HMI screens when the PLC signals the HMI to do so. I do not want to necessarily have to enter a password every time the screen is selected plus passwords can be forgotten. I can prevent the HMI from activating IOs within the PLC but I would like to prevent access to certain screens within the HMI programming when signaled from the PLC. Although I can blank out objects within a screen with their "Object Visibility Option" screen, however, the function keys are still active per their programming and do not appear to have the "Object Visibility Option" like other objects do, that I am aware of, That would definitely meet my needs too if that is possible. Thoughts?

 

Thank you in advance.

 

Jerry

  • 4 answers
  • 222 views

  • Durallymax (Customer)

    Use the PLC <-> Panel features under Function to use the PLC to change the current screen to a duplicate of the screen that just displays values and has nothing assigned to function keys. Once back to a state where user can adjust settings, have the PLC switch HMI to the appropriate screen.

    Selected as Best

  • Durallymax (Customer)

    Use the PLC <-> Panel features under Function to use the PLC to change the current screen to a duplicate of the screen that just displays values and has nothing assigned to function keys. Once back to a state where user can adjust settings, have the PLC switch HMI to the appropriate screen.

    Selected as Best

    • Sparkyinak (Customer)

      Thanx.

       

      I’ll give that a try later and let you know… or have more questions about it.

    • Sparkyinak (Customer)

      Alright, I tried it and under the concept and was able to trigger it though the HMI’s software simulator. I’ll have to see how the HMI and PLC will interact with one another. That will take a few days. I’ll keep you posted. Thanx.

    • Sparkyinak (Customer)

      As I said, I would get back to you, I am.

       

      I did finally get to addressing what you proposed. Thank you. I have not completely set it up yet but I was able to get the PLC to tell the HMI to show what screen and when. Once I can get to that point and the way I have the HMI screens configured, it will be simple instructions to prevent access to the screens I want to be blocked.

       

      Thanx

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