Hot bins, screen and alarms

On an asphalt plant the hot aggregates go from the dryer drum to the elevator, the screen and the hot bins, from where they are weighed per fraction. iAsphalt monitors every stage and warns you before a full or empty fraction stops production.

What it monitors

Aggregate temperature at the drum outlet and in the hot bins.
Level of every hot bin (high and low level sensors).
Motor current of the elevator, screen, filter and mixer (ammeters on screen).
Screen overflow.

Alarms you will see

Low fraction level. The cold feed of that fraction must be increased or production slowed. iAsphalt can adjust the cold feeders automatically so that fractions stay balanced.
High level / overflow. The fraction is in surplus; reduce the corresponding cold feed.
Temperature out of range. Aggregates that are too cold give a poor mix, too hot burn the bitumen. Check the burner and the material flow.
Motor overcurrent. The system stops the motor and whatever feeds it, not the whole plant.

Where you see them

On the alarm bar of the screen, with colour and text, and in the alarm log with start time, clearance time and the user who acknowledged it. The log is the first thing we ask for when you call support.

Setting limits

Temperature and level limits are set in the settings by the administrator.  We recommend keeping them as tight as the plant allows: the goal is to anticipate, not to stop.