FP SDK 5.14. Rapid Data Value Changed Event.

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1

Dear sirs,

Could someone shed some light to the the logic of the rapid data changing event triggering.
I have a PERS variable and have a subscribtion on the data changing.
Here it is:

public void SubscribeMethodOnRapidData(string rdName, Action method)
{
_rapidsMap.Add(rdName, method);
_controller.Rapid.GetRapidData(“T_ROB1”, “ProgressModule”, rdName).ValueChanged += rd_changed;

}

private void rd_changed(object sender, DataValueChangedEventArgs e)
{
if (sender is RapidData)
{
MessageBox.Show(“RapidData has changed!”);
string rdName = ((RapidData)sender).Name;
Action method = _rapidsMap[rdName];
ControllerDataToComponent sgnToComponent = new ControllerDataToComponent();
sgnToComponent.dataValue = GetRapidData(rdName).ToString();
method.Invoke(sgnToComponent);
}
else
MessageBox.Show(“sender is not RapidData!”);
}

During the execution the value of the rapid variable changes many times, but I have no event triggering. Why? What I had missed? It works perfect with the signals…

Thank you in advance…

P.S. I’m using the virtual controller

2

Hi SAV,

Got your message so here I am :+1:
First here is an example which I ran just now which works, you need three buttons and a TpsLabel, and then the declaration of the ctrl and myRD needs to be at the top of the class declaration.

private void btnSub_Click(object sender, EventArgs e)
{
myRD = ctrl.Rapid.GetRapidData("T_ROB1", "Module1", "myNum");
this.myRD.ValueChanged += myRD_ValueChanged;
}
private void myRD_ValueChanged(object sender, DataValueChangedEventArgs e)
{
this.Invoke(new EventHandler(ToTheLabel), sender, e);
}
private void ToTheLabel(object sender, System.EventArgs e)
{
if (this.tpsLabel1.Text == "")
{
this.tpsLabel1.Text = DateTime.Now.ToString() + " : " + myRD.Value.ToString();
}
else
{
this.tpsLabel1.Text = this.tpsLabel1.Text + " " + DateTime.Now.ToString() + " : " + myRD.Value.ToString();
}
}
private void btnClear_Click(object sender, EventArgs e)
{
tpsLabel1.Text = "";
}

Regarding your code, first your use of the windows messagebox is a no-no, you should be using the GTPUMessageBox instead.

I’ll go through the rest later.

3

Sorry, had to do some other stuff in between. OK lets look at your code.

  1. Can’t see your other stuff, so I really can’t say regarding your calls like _rapidsMap
  2. In the event [rd_changed] you have code that make UI changes (MessageBox.Show) before the invoke. Wouldn’t it be better to just send along the sender and e and then do the strings and sgnToComponent execution in the invoked method. See Working with RAPID data and Controller events and threads
    In my example above you see that I use that in the [myRD_ValueChanged], which invokes [ToTheLabel].
  3. what do you use the delegate for?
    Action
    Can’t make sense of that.
4

You was right, it works. The key point was the following: the variable myRd must be not local.
Thank you, John.

5

Hi guys.
is it possible to fire event also for ‘Signal’ (I/O system), but not only PERS Rapid variable?