Abstract: There is provided a communication system. A superordinate unit configured to transmit a registration instruction command instructing that identifier registration. Subordinate units configured to be connected to the superordinate unit such that communication is possible and to register identifiers corresponding to the registration instruction command, into the superordinate unit. Each of the subordinate units includes a creating unit configured to create an identifier corresponding to the registration instruction command, an instructing unit configured to instruct the creating unit to create another identifier, if a registration request command is received from another subordinate unit before a registration request command including the identifier created by the creating unit is transmitted to the superordinate unit, and a transmitting unit configured to transmit the registration request command including the identifier created by the creating unit to the superordinate unit.

Abstract: Convenience of a control device for controlling an operating state of electrical equipment is enhanced. To achieve the enhanced convenience, a control device for controlling an operating state of electrical equipment includes a receiver, a tough-panel liquid crystal display, and an operation controller. The receiver receives power demand information transmitted from a broadcast station. The liquid crystal display receives user setting information indicating settings for operation of the electrical equipment. The operation controller controls the operating state of the electrical equipment in order to adjust power consumption of the electrical equipment, based on the power demand information received by the receiver and the user setting information input to the liquid crystal display.

Abstract: An unreceivability detector (6) that, based on various information obtained from a signal received from a broadcasting station of a digital broadcast program being viewed/listened to, detects that the received signal of that broadcasting station is currently unreceivable and outputs an unreceivability notification, an affiliated station memory (8) that stores channel information of the program being viewed/listened to and channel information of a station affiliated with that broadcasting station, and a tuning control unit (7) that, when it receives an unreceivability notification from the unreceivability detector, retrieves the channel information of the affiliated station from the affiliated station memory (8) and permits the program of the affiliated station to be viewed/listened to, if it is currently in a receivable state, and outputs an instruction to make a channel search for an affiliated station if no affiliated station is stored in the affiliated station memory are provided.

Abstract: A delay profile generating circuit 9 generates a delay profile signal. Concerning the delay profile signal, a ghost decision circuit 10 makes a decision as to the presence or absence of ghosts that will appear during traveling of a mobile vehicle in response to a transmission mode signal fed from a changeover switch 8. The delay profile signal and the decision signal about the presence/absence of the ghosts are delivered to a window control circuit 13 via an accumulator 11. The window control circuit 13 sets and controls the FFT window position of an FFT circuit 5 in response to a guard correlation signal fed from a guard correlation signal generating circuit 12 and a signal fed from the accumulator 11.

Abstract: A delay profile generating circuit 9 generates a delay profile signal. Concerning the delay profile signal, a ghost decision circuit 10 makes a decision as to the presence or absence of ghosts that will appear during traveling of a mobile vehicle in response to a transmission mode signal fed from a changeover switch 8. The delay profile signal and the decision signal about the presence/absence of the ghosts are delivered to a window control circuit 13 via an accumulator 11. The window control circuit 13 sets and controls the FFT window position of an FFT circuit 5 in response to a guard correlation signal fed from a guard correlation signal generating circuit 12 and a signal fed from the accumulator 11.

Abstract: An unreceivability detector (6) that, based on various information obtained from a signal received from a broadcasting station of a digital broadcast program being viewed/listened to, detects that the received signal of that broadcasting station is currently unreceivable and outputs an unreceivability notification, an affiliated station memory (8) that stores channel information of the program being viewed/listened to and channel information of a station affiliated with that broadcasting station, and a tuning control unit (7) that, when it receives an unreceivability notification from the unreceivability detector, retrieves the channel information of the affiliated station from the affiliated station memory (8) and permits the program of the affiliated station to be viewed/listened to, if it is currently in a receivable state, and outputs an instruction to make a channel search for an affiliated station if no affiliated station is stored in the affiliated station memory are provided.

Abstract: A data transmission method capable of suppressing communication errors with a simple microcomputer processing is provided. Upon a pulse signal in which specific data is made up of H and L levels, either one of which has a pulse width taken as a first fundamental signal length T1 and the other of which has a pulse width taken as a second fundamental signal length T2 equal to an integer multiple of the first fundamental signal length T1, a correction is performed by increasing or decreasing the second fundamental signal length T2 by a length equal to an integer multiple of a value resulting from dividing the first fundamental signal length T1 of the transmission-side pulse signal by an integer.

Abstract: A data transmission method capable of suppressing communication errors with a simple microcomputer processing is provided. Upon a pulse signal in which specific data is made up of H and L levels, either one of which has a pulse width taken as a first fundamental signal length T1 and the other of which has a pulse width taken as a second fundamental signal length T2 equal to an integer multiple of the first fundamental signal length T1, a correction is performed by increasing or decreasing the second fundamental signal length T2 by a length equal to an integer multiple of a value resulting from dividing the first fundamental signal length T1 of the transmission-side pulse signal by an integer.

Abstract: A programmable monitoring unit which is adapted for simplifying the programming and display of user programs in a programmable controller using a sequential function charting technique. In a first embodiment, the display of the SFC data is easily compressed such that a combined display element chart is accessed by inputting a first and a second display element and a combined element representing the first and second inputs are displayed in a single display area. In a second embodiment, the present invention provides a means for readily displaying the functional status and changes of transactions based on a program's operational cycles in order to facilitate the debugging of the program.