Abstract: In some embodiments, an inverter system may include a plurality of inverters. In some embodiments, a method of controlling the plurality of inverters may include one inverter among the plurality of inverters set as a communication master to control other inverters set as communication slaves, may include the steps of generating a communication master signal in the communication master to transmit to the communication slaves, may verify whether or not the communication master signal is designated to be received by the communication slaves when the communication slaves receive the communication master signal, and may transmit a response signal with respect to the communication master signal to the inverters of the inverter system according to the verification result.

Abstract: RFID readers, reader systems, and methods are provided for processing RFID tags through interruptions for antenna change or other reasons. If the reason for the interruption is an antenna change, the reader restarts processing the tags initializing any operational parameters. If the reason is other than an antenna change, the reader determines whether the operation is to be continued or to be restarted upon power up and proceeds accordingly.