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+--- Thread: VAV Optimiser, Max Function (/showthread.php?tid=3508)
VAV Optimiser, Max Function - christian.troen@haaland.no - 11.08.2021
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)RE: VAV Optimiser, Max Function - admin - 12.08.2021
Fault objects should have similar names to the value objects that you are using for calculation. You need to change the "search_for" and "replace_with" parameters in gsub so the value object name is converted to the fault object name.
Code:
function tag_max(tag)
local objects = grp.tag(tag)
local result = -math.huge
for _, object in ipairs(objects) do
local faultname = obj.name:gsub('search_for', 'replace_with')
local faultobj = grp.find(faultname)
local fault = false
if faultobj then
fault = faultobj.value
end
if not fault then
result = math.max(result, object.value)
end
end
return result
end
max = tag_max('MaxExtDmpPos')
log(max)
grp.checkwrite('32/1/23', max)