Hello,

I have a problem with the simulation of my MTP1900 with tia portal v18 and plc sim advanced.
I'm trying to create a faceplate that calls a popup, with another flaceplate in it wich is a button “automatic” / “Manual”

The click on one of these set a bit of a communication Word, wich activate the automatic mode of a valve in my tia portal FB.

The problem here is that these buttons works, but a maximum of 3 times.

After this, the buttons are blocked and i have to close and open a second time my popup, and the exact same situation happens.

it set a bit of a command word, and the status come from a status word of the plc, so i'm sure that the communication PLC/HMI works, and the internal tags of the faceplates are connected. 

These words are set to 0 at each cycle of the plc (they are directly written to internal tags), so it's not a problem of bits that aren't reset.

Have you got any idea of why the problem happens ? 

Here is the code of the buttons :

export function Text_box_1_OnTapped(item, x, y, modifiers, trigger) {
let myULINT = Faceplate.Properties.Bit_Index_Command_Auto;
  let myUINT;
  if (myULINT >= 0 && myULINT <= 65535) {
    myUINT = myULINT & 0xFFFF;  // masque les 16 bits de poids faible

HMIRuntime.Tags.SysFct.SetBitInTag("Word_Exchange_Command", myUINT);

}
}