VAV Optimiser, Max Function

[christian.troen@haaland.no]

Is there a way to do the following:

Today I write the highest value of tag MaxExtDmpPos to a virtual object. It works fine.
All values with in the tag will be considered in the function. 
If I want the function to check another value before  to include the value in this function.

Example: 6/5/28 is in MaxExtDmpPos tag. Another group-address for this VAV shows if it is any errors in the VAV. This group-address will be "True" if there is any error. 
If this is the case, I want 6/5/28 to not be included in the function. 
 

Script for the function:

Code:

function tag_max(tag)
  local objects = grp.tag(tag)
  local result = -math.huge

  for _, object in ipairs(objects) do
    result = math.max(result, object.value)
  end

  return result
end

max = tag_max('MaxExtDmpPos')
log(max)

grp.checkwrite('32/1/23', max)