Timer on LogicMachine | Logic Machine platform for KNX/EIB, EnOcean, Modbus, DALI, BacNet

Example: Timer on LogicMachine

Task

The following script is creating a timer for switching off specific KNX group address after specific time period. For example, there is Air Conditioner sitting on group address 1/1/1 (On/Off). You want to switch it off automatically after 50 minutes from the moment when it is switched on.

Scheduled script

Create a scheduled script which runs every minute:

Source code

-- group address or name
addr = '1/1/1'
 
-- find required object
obj = grp.find(addr)
 
-- object exists and current state is "on"
if obj and obj.data then
  -- delta is in seconds
  delta = os.time() - obj.updatetime
 
  -- switch off when timer expires
  if delta >= 50 * 60 then
    grp.write(addr, false)
  end
end