I would like to make a function where I can change the brightness of the HMI screen via a slider when the runtime is On. I am using MTP400 unified basic HMI. I found posts asking to use the "SetBrightness" functionality, but I haven't been able to get it to work. How can I add a brightness adjustment to the slider using the "SetBrightness" functionality?

Found instructions:

Controlling the display brightness using the system function
You can also control the display brightness with the system function "SetBrightness". You
can configure this system function, for example, on a slider control and regulate the
brightness using "Brightness " tag:
1. Configure a slider control with a maximum value "100" and a minimum value "10".
Background: As project engineer you have to ensure that operating elements can be read
even with a dimmed display. Protection against unintentional operation is only
guaranteed when the display is switched off.
Use a button if you want to switch off the display completely. Configure the system
function "SetBrightness" to the "Pressed" event and set the "Value" to "0".
2. Configure the "Brightness" tag as a process value.
3. Configure the system function "SetBrightness" to the "Change" event of the slider control.
4. Select the "Brightness" tag as "Value".
When you operate the slider control in Runtime, the brightness is set to the corresponding
value.

The problem is that this model of the HMI does not have "Change" option at Events anymore. Options are: Activated, Deactivated, Click left mouse button, Press key, Release key, Click right mouse button.

Thank you.

Stefan Arcularius

Hi Kokeilija,

You will find the OnPropertyChanged event on the Properties screen in the Dynamization column, not on the Events screen.

But you would not need to use a tag to change the brightness, the script shown in the screenshot should do that as well.

Kind regards
Stefan

 This works. Thanks a lot.

I solved in this mode