A method and assembly for controlling a plunger of a magnetic actuator includes generating a magnetic flux at the plunger that opposes a first bias from a first spring having a first preload. The second semiconductor region includes a plurality of portions arranged in a direction along a surface of the substrate. Each of the sensor units retains type information thereof, and sets a unique identification number by transmitting the signal to each other. Messages exchanged between the participating terminals are intercepted within the network 2,14 supporting the service, and the participants charged in accordance with the negotiated cost sharing formula.