FBEditor log write - Printable Version

Code:

require('custom.fbeditor20.Control')

Input = 555
Limit_1_ON = 400
Limit_1_OFF = 300
Limit_2_ON = nil
Limit_2_OFF = nil
Limit_3_ON = nil
Limit_3_OFF = nil
 threshold1, threshold2, threshold3 = fbe_hysteresis_3_limits(Input, Limit_1_ON, Limit_1_OFF, Limit_2_ON, Limit_2_OFF, Limit_3_ON, Limit_3_OFF, 'fb__New_diagram__fbe_hysteresis_3_limits__id')

Code:

--- [Function] fbe_hysteresis_3_limits
--- Hysteresis with 3 limits
--- [Comment]
--- The module evaluates an input value in dependence on 3 freely definable limits (3 switch-on and 3 switch-off values).
--- When the limits are exceeded or dropped below, the outputs 1-3 are controlled operated.
--- If a limit has been exceeded (dropped below), first the limit must be dropped below (exceeded) again, before the output can be sent again if the limit is exceeded (dropped below) again.
--- [Input] 
--- Input [object]
--- Limit 1 ON [value]
--- Limit 1 OFF [value]
--- Limit 2 ON [value]
--- Limit 2 OFF [value]
--- Limit 3 ON [value]
--- Limit 3 OFF [value]
--- [Output] 
--- threshold1 - Threshold 1 [object, storage]
--- threshold2 - Threshold 2 [object, storage]
--- threshold3 - Threshold 3 [object, storage]
function fbe_hysteresis_3_limits(input, on1, off1, on2, off2, on3, off3, blockID)
  local on = { on1, on2, on3 }
  local off = { off1, off2, off3 }
  local prevState = storage.get(blockID .. "_prevState") or {}
  local out = {}
  log(on)
  log(off)
  log(prevState)
  for i=1,3 do
    local state = 0
    if on[i] ~= nil and input > on[i] then
        state = 1
      elseif off[i] ~= nil and input < off[i] then
        state = -1
      end
    if state == 0 or prevState[i] == nil or prevState[i] == state then
      out[i] = nil
    else
      out[i] = state > 0
    end
    prevState[i] = state
  end
  storage.set(blockID .. "_prevState", prevState)
  return out[1], out[2], out[3]
end