Get object name

[admin]

Event script (attached to a tag):

Code:

value = event.getvalue()
name = grp.find(event.dst).name

now = os.time()

h_key = 'h_alarm'
l_key = 'l_alarm'

h_lim_obj  = string.gsub(name, '_PV', '_HAL')
l_lim_obj  = string.gsub(name, '_PV', '_LAL')

alarm_h_obj = string.gsub(name, '_PV', '_AHL')
alarm_l_obj = string.gsub(name, '_PV', '_ALL')

h_alarm = value > grp.getvalue(h_lim_obj)
l_alarm = value < grp.getvalue(l_lim_obj)

if h_alarm then
  storage.exec('hsetnx', h_key, name, now)
else
  storage.exec('hdel', h_key, name)
  grp.checkwrite(alarm_h_obj, false)
end

if l_alarm then
  storage.exec('hsetnx', l_key, name, now)
else
  storage.exec('hdel', l_key, name)
  grp.checkwrite(alarm_l_obj, false)
end

Resident script. Adjust the sleep time as needed (at least 5 seconds) depending on the average delay between objects value being detected as out of bounds and the alarm object change to 1.

Code:

if not check then
  storage.openconn()

  check = function(storage_key, alarm_obj_key)
    local now = os.time()
    local items = storage.exec('hgetall', storage_key)

    for name, time in pairs(items) do
      local delay_obj = string.gsub(name, '_PV', '_AD')
      time = time + grp.getvalue(delay_obj)

      if now >= time then
        local alarm_obj = string.gsub(name, '_PV', alarm_obj_key)
        grp.checkwrite(alarm_obj, true)
      end
    end
  end
end

check('h_alarm', '_AHL')
check('l_alarm', '_ALL')