A method for configuring a master/slave board during initial booting of dual boards, and dual boards thereof are proposed. Each of the dual boards includes: a voltage input part to which an AC voltage is applied by initial booting; a voltage converter for converting the applied AC voltage into a DC voltage; a communication part for transmitting a DC voltage value corresponding to the converted DC voltage to a counterpart board and receiving a DC voltage value of the counterpart board from the counterpart board; and a controller for initializing the voltage converter when an initial boot signal and the AC voltage are applied from outside, converting the DC voltage converted by the voltage converter into the DC voltage value, and comparing the DC voltage values of each board transmitted and received through the communication part, so as to configure each board as a master or slave board.

A slave station (102), in an initial state, puts a relay device to a relay-disconnected status and transmits an assignment request requesting address assignment for the own slave station. A master station (101), in response to an assignment request from an adjacent slave station (102), performs address assignment for the slave station (102), and transmits an assignment request response containing an assigned address. The slave station (102), upon reception of the assignment request response, stores the address contained in the assignment request response to a memory, and puts the relay device to a relay status. If the slave station (102) receives the assignment request after address assignment for the slave station is completed, the slave station performs address assignment for a slave station being a sender of the assignment request instead of relaying the assignment request, and transmits an assignment request response containing an assigned address.

An actuator in a HVAC system includes a mechanical transducer, a processing circuit, a wireless transceiver, and a power circuit. The processing circuit includes a processor and memory and is configured to operate the mechanical transducer according to a control program stored in the memory. The wireless transceiver is configured to facilitate bidirectional wireless data communications between the processing circuit and an external device. The power circuit is configured to draw power from a wireless signal received via the wireless transceiver and power the processing circuit and the wireless transceiver using the drawn power. The processing circuit is configured to use the power drawn from the wireless signal to wirelessly transmit data stored in the memory of the actuator to the external device via the wireless transceiver, wirelessly receive data from the external device via the wireless transceiver, and store the data received from the external device in the memory.

A communication device includes a processor and a communication part. The communication part communicates with one or more slaves. The processor has a function of executing communication processing and setting processing. The communication processing includes causing the communication part to transmit a frame including main data to the one or more slaves in a first period. The setting processing includes setting N (N is an integer of 2 or more) second periods within the first period. The setting processing includes setting a slot for performing communication of sub-data other than the main data for each of the second periods. The frame includes at least one of the slots during a transmission period of the main data.

Disclosed is a system for transmitting and receiving safety information, which generates first safety information about a control target and second safety information representing the occurrence or not of an error in the control target by using one microcontroller. The system includes a first slave controller generating first safety information and second safety information by using sensing data obtained from a control target and a master controller receiving the first safety information and the second safety information from the first slave controller through a wireless channel. When an error occurs in the first slave controller, the first slave controller transmits the second safety information to a second slave controller, and the second slave controller transmits the second safety information, received from the first slave controller, to the master controller.

The present disclosure relates to a communication electronic control unit (ECU) provided in a vehicle to be used for exchange of a signal with an external device, the communication ECU including a bus interface configured to exchange signals with a plurality of slave ECUs in the vehicle, a primary processor configured to perform software cloning for at least one of the plurality of slave ECUs, and a secondary processor configured to determine whether to operate, based on whether overload is applied to the primary processor.

A method for integrating a further bus subscriber into a bus system, and a bus system, having a master module and subscribers disposed in series, includes the temporally consecutive method steps: in a first method step, the further bus subscriber transmits a data packet to the master module in order to log in to the master module, in a second method step, a bus subscriber disposed between the further bus subscriber and the master module stops the data packet and checks whether the bus system has already received a release, in a third method step, the first bus subscriber forwards the data packet to the master module if the bus system has not yet received a release, or in a third, in particular an alternative, method step, if the bus system has already received a release, the bus subscriber stores the data packet and waits until the release of the bus system is revoked and after the release has been revoked, forwards the stored data packet to the master module.

A device includes a master device, a set of slave devices and a bus. The master device is configured to transmit first messages carrying a set of operation data message portions indicative of operations for implementation by slave devices of the set of slave devices, and second messages addressed to slave devices in the set of slave devices. The second messages convey identifiers identifying respective ones of the slave devices to which the second messages are addressed requesting respective reactions towards the master device within respective expected reaction intervals. The slave devices are configured to receive the first messages transmitted from the master device, read respective operation data message portions in the set of operation data message portions, implement respective operations as a function of the respective operation data message portions read, and receive the second messages transmitted from the master device.

The purpose of the present invention is to enable even an unskilled person to easily identify a related event in a short time from a collected event log. A system management device (1) is provided with: a display control part (32) for causing a display part (14) to display an event log; an identification part (30) for identifying an event of interest log specified by a user through an operation part (11); and an extraction part (31) for extracting a related event log related to an event of interest from an event log database (20). The display control part (32) causes the display part (14) to display the event of interest log and the related event log.

An electric power control system capable and a control device and a controlled device of electric power simplifying and reducing the cost of a slave device and electric power are provided. A power control system includes a master device supplied with power from a battery and a slave device powered by the battery through the master device. The slave device can also be supplied from a sub-battery or a solar cell that is different from the battery, the master device is provided with a control unit for controlling the slave device to be powered from the battery and the solar cell based on the power supply state of the battery and the solar cell.