Resident script pump circulation

[Domoticatorino]

It is a Schneider HL 2.0.1

I mean updated version of above script I've adjusted it to be more universal, added new variables:

Code:

valveStatesTag = 'circulation_pump'
pumpGA = '1/1/10'
openingValveTime = 300 -- time for fully open the valve (maximum time for next calculation)
minInterval = 30 -- minimum offset for next calculation

opened, firstTimestamp = false, 0

valveStates = grp.tag(valveStatesTag)
for v = 1, #valveStates, 1 do
 valveState = valveStates[v]
 if valveState.value then
   opened = true
   if firstTimestamp > 0 then
       if firstTimestamp > valveState.updatetime then firstTimestamp = valveState.updatetime end
   else
       firstTimestamp = valveState.updatetime
   end
 end
end

if opened then
   fullyOpened = (os.microtime() - firstTimestamp) >= openingValveTime
   if fullyOpened then
       grp.checkwrite(pumpGA, true)
       nextCalculationAfter = minInterval
   else
       grp.checkwrite(pumpGA, false)
       nextCalculationAfter = openingValveTime + 1 - (os.microtime() - firstTimestamp) -- run a little after possible change
   end
else
   grp.checkwrite(pumpGA, false)
   nextCalculationAfter = openingValveTime + 1
end

log('Next calculation after: ' .. nextCalculationAfter .. 's.')
os.sleep(nextCalculationAfter)

No, it does not work.
there is not any mistake and any error log. Is there the opportunity to have a debug for lua?