Scripts two pumps alternate

[admin]

You will need 3 scripts.
Scheduled script that run once each hour:

Code:

on_1 = grp.getvalue('5/0/1')
on_2 = grp.getvalue('5/0/2')

-- one of the pumps is on
if on_1 or on_2 then
  pump_time = storage.get('pump_time', 0)
  pump_time = pump_time + 1

  -- try switching to another pump
  if pump_time > 50 then
    stop_1 = grp.getvalue('5/0/10')
    stop_2 = grp.getvalue('5/0/20')

    -- first is on, second is not in stop state
    if on_1 and not stop_2 then
      grp.write('5/0/1', false)
      grp.write('5/0/2', true)

      pump_time = 0
    -- second is on, first is not in stop state
    elseif on_2 and not stop_1 then
      grp.write('5/0/2', false)
      grp.write('5/0/1', true)

      pump_time = 0
    end
  end
else
  pump_time = 0
end

storage.set('pump_time', pump_time)

Event script for first pump fault (5/0/10):

Code:

on_1 = grp.getvalue('5/0/1')
on_2 = grp.getvalue('5/0/2')

stop_1 = event.getvalue()
stop_2 = grp.getvalue('5/0/20')

-- switch to the second pump
if stop_1 then
  if not stop_2 and not on_2 then
    grp.write('5/0/1', false)
    grp.write('5/0/2', true)

    storage.set('pump_time', 0)
  end
-- fault is removed and no pump is running
elseif not on_1 and not on_2 then
  grp.write('5/0/1', true)

  storage.set('pump_time', 0)
end

Event script for second pump fault (5/0/20):

Code:

on_1 = grp.getvalue('5/0/1')
on_2 = grp.getvalue('5/0/2')

stop_1 = grp.getvalue('5/0/10')
stop_2 = event.getvalue()

-- switch to the first pump if it's not in a fault state
if stop_2 then
  if not stop_1 and not on_1 then
    grp.write('5/0/2', false)
    grp.write('5/0/1', true)

    storage.set('pump_time', 0)
  end
-- fault is removed and no pump is running
elseif not on_1 and not on_2 then
  grp.write('5/0/2', true)

  storage.set('pump_time', 0)
end