How Do I detect Comms Fault On HMI?

I have Compact Logix and HMI and when there is a comms fault between the two the HMI mer cannot be shut down due to interlocks on buttons that rely on tags from the PLC.

I need to be able to detect when there is a comms fault between the HMI and PLC to change button visibility on the HMI so the mer can be shut down.

I was looking on the Rockwell Site and found some knowledge but I'm not sure how to emplement this into the FTView Syntax / Expression for button visibility.

https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/9398
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/23092
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/43438/loc/en_US#__highlight

I am an apprentice so any knowledge insight or ways you may have done this before would be very helpful

do you have a picture or any description of the fault?

could there be an undefined tag on one of the screens causing the fault? maybe multiple screens.

is the system on a network with others? could be that there is an ip conflict causing the error.
just throwing out things I have come across.
james

Add the visibility animation to your shutdown button, select the invisible radio button. For the expression use:

{[shortcut]@IsPresent}

There is a bit of a delay when the reset of of the controls on the screen show their error state and when the shutdown button appears, but this seems to work.

Sounds like you are just trying to mask a problem.

I would be looking at why you are having so many comms faults.

Fix that and you wouldn't need to be shutting the HMI down.

Cheers

Mark

On lines I worked on years back that had Quartech HMI's with PLC 5's the OEM had a N.C. pushbutton inside the cabinet next to the HMI that the power was run through.

No electricity and the HMI will shut down regardless of any tag on or off.

Give this a try. It takes a second for it to respond but it works. Hope this is helpful