Peak load limiter

[Erwin van der Zwart]

Hi,

I created this a while ago, maybe it could help you in your task.

Code:

-- Set adresses
address_max = '1/1/2'
address_hyst = '1/1/3'
address_relais1 = '1/1/4'
address_relais2 = '1/1/5'
address_relais3 = '1/1/6'
address_relais4 = '1/1/7'

-- Get measured power
power = event.getvalue()

-- Get limit value
max = grp.getvalue(address_max)

-- Get Hysteresis
hyst = grp.getvalue(address_hyst)

-- Calculate floor value
hyst_floor = math.floor((max - hyst) + 0.5)

-- Check if chanels need to be turned on
if power < hyst_floor then
   -- get current state of relais 4
 current_state_relais4 = grp.getvalue(address_relais4)
 if current_state_relais4 == false then
    grp.write(address_relais4, true)
    -- exit script and after that cascade to chanel 3
     return
 end
   -- get current state of relais 3
 current_state_relais3 = grp.getvalue(address_relais3)
 if current_state_relais3 == false then
    grp.write(address_relais3, true)
    -- exit script and after that cascade to chanel 2
     return
 end
  -- get current state of relais 2
 current_state_relais2 = grp.getvalue(address_relais2)
 if current_state_relais2 == false then
    grp.write(address_relais2, true)
    -- exit script and after that cascade to chanel 1
     return
 end
 -- get current state of relais 1
 current_state_relais1 = grp.getvalue(address_relais1)
 if current_state_relais1 == false then
    grp.write(address_relais1, true)
   -- exit script
     return
 end
end

-- Check if chanel 1 need to be turned off, after that cascade to chanel 2, then cascade to chanel 3 etcetera
if power > max then
 -- get current state of relais 1
 current_state_relais1 = grp.getvalue(address_relais1)
 if current_state_relais1 == true then
   grp.write(address_relais1, false)
 else
     -- get current state of relais 2
     current_state_relais2 = grp.getvalue(address_relais2)
     if current_state_relais2 == true then
       grp.write(address_relais2, false)
   else
          -- get current state of relais 3
          current_state_relais3 = grp.getvalue(address_relais3)
          if current_state_relais3 == true then
            grp.write(address_relais3, false)
        else
              -- get current state of relais 4
             current_state_relais4 = grp.getvalue(address_relais4)
             if current_state_relais4 == true then
               grp.write(address_relais4, false)
             end
          end
     end
 end
end

BR,

Erwin