NodeJS Scripting issue with value sum definition

Question

The home gas-meter is providing the actual gas count. With the subtraction (last minus before) I get 'Delta_Gas'. This is working. Now I am trying to sum up gas these consumption values greater 0. In a typical cycle after gas burner ON max.10 values need to be summed up every minute. With burner OFF gas consumption should be set to zero(0).
Finally I want to see the gas consumption values for each single burner ON/OFF cycle. Who can support my approach as I am a little bit lost?

var v1 = dp('/User Registers/Delta_Gas');
var sum = dp('/User Registers/Sum_Gas') 
var s1;

AddValues(s1);
setInterval(AddValues, 3600000, s1); //1h Laufzeit

function AddValues(s1) 
const add = add + v1
const sum = add
{
if(v1 > 0) { for (var i = 0; i < 10; i++) {
  console.log(sum)
}else{
  console.log(0)
}