Display text in TextBox with return value

Hello,

Im trying to display a text in a Text Box using the return value from a script.

export function txtFirstAlarm_Text_Trigger(item){

   var value;

   let filterAlarm = "AlarmClassName = 'PackML_Warnings'"

   HMIRuntime.Alarming.GetActiveAlarms(1033, filterAlarm).then(

      function(activeAlarms){

      value = activeAlarms[0].EventText;

      Tags("dbTest_Unified").Write(value);

      }

   )

   return value;

}

 In dbTest_Unified I get the desired result, but nothing shows up in the TextBox itself. I guess Im doing something wrong at the last line, return value; ?

Try writing the text property directly

Screen.FindItem('TxtFirstAlarm').Text.= value;

Stefan Arcularius

Hi,

I am missing the trigger information for the script. If you have not specified a trigger and you are using a current version of WinCC Unified, the trigger will be set to 'Tags (automatic)'. In this case, the script will be triggered on changes to the tag "dbTest_Unified", which is definitely not intended.

However, for me, the main cause of your problem is the position of the return statement. Because GetActiveAlarms is asynchronous, the return value of the txtFirstAlarm_Text_Trigger function is written before the GetActiveAlarms promise is fulfilled.

A few additional notes:

• Don't use var, use let or const instead!
• GetActiveAlarms can cause a huge load, try using alarm subscriptions instead.

Kind regards
Stefan

 This makes a lot of sense... I´ll give this a try, this will be most likely the problem... Will post again if this fixes the problem.

Usually I use let but when I make a script Siemens automaticly makes the return a var?

I´ll take a look into the alarm subscriptions.

Thanks!