How to latch or unlatch a datapoint?

[yosu]

How can I latch or unlatch a datapoint?

I want to set to true datapoint1 when datapoint2 is true, don't mind datapoint3 value, and set to false only when datapoint3 is false, don't mind datapoint2 value.

Thanks

[nmnogueira]

Create a script associated with a contol manager.
Do something like:

Code: Select all

main()
{
  dpConnect("work2","datapoint2", "datapoint3");
}

work(dp2,val2,dp3,val3)
{
  if(val2)
    dpSet("datapoint1",1);

  if(!val3)
    dpSet("datapoint1",0);
}

[Gertjan van Schijndel]

I prefer always to not connect to more datapoint elements then needed. So in this case I prefer split the dpConnect into two, since the behavior does not depend on the other datapoint element.

[yosu]

Thanks for your answer

[ozangor]

You may also use the dp_funct config in order to achieve this.

Code: Select all

first = second || (!second && third);

[nmnogueira]

Dear Ozan

I think that solution does not work.

e.g. if third = FALSE

Code: Select all

first = second || (!second && FALSE) = second || FALSE == second

I think it's possible to do it with a DP function, but you would have to use "Initialize global variable" and create a script for it.