What are the possible ways to call or dispatch AGVs?
In systems that require the ability to remotely call and dispatch AGVs there are several methods possible:
Simple Call Button — At each AGV calling location a button, lanyard or switch can be provided. The call signal is usually routed to a central controller. The controller will store the calls first in – first out order. When an AGV becomes available for a new task, the controller will send it to the next calling station on its wait list.
Keypad Terminal — The AGV call location is equipped with PC terminal or touch type keypad/display. The operator can give the AGV controller more specific information regarding the call task. This information can include the destination for the load once it is picked up, the type of load, priority or even allow the operator to queue multiple calls for different load pickups.
Automatic Call — The call station can be part of an automatic process such as the output from a stretchwrapper, palletizer or production line. In such cases an interface can be provided between the device controller (stretchwrapper, etc.) and the AGV call controller to permit automatic signaling when a load is ready for pickup. Automatic calls can also be generated by sensors (limit switches, photoeyes, etc.) mounted at the load point of the call station.
