A displacement assembly includes a rotor and a plurality of reciprocating members in engagement with the rotor. A registration protocol may be used by the monitoring module and the remote site in generating the messages communicated during the registration process. The memory circuit is accessed both serially and randomly. The packets are then transported over the OTN network from the source device to the destination device. In another embodiment, the counteracting circuit includes a switch, and a sensor to trigger the switch when the appropriate threshold is reached.