摘要:
PROBLEM TO BE SOLVED: To establish synchronization even in a logical ring network having all types of connection forms such as an asymmetrical double ring network.SOLUTION: In a synchronization system, a time master device (M) transmits measurement information used for measuring a communication time, and also measures a time from transmitting the measurement information to receiving the measurement information again after circulation through a network, and time slave devices (Sx) each measure a time from receiving the measurement information to receiving the measurement information again, and branch devices (Cx) each measure a time from receiving the measurement information to receiving the measurement information again for each branch destination, and the time slave devices (Sx) each calculate a delay time on the basis of the times measured by the respective devices, and also calculate as a synchronization time a time after the delay time from a time when having received timing information for synchronization time calculation from the time master device (M).
摘要:
PROBLEM TO BE SOLVED: To provide a network which maintains a constant transmission bandwidth when an acoustic signal is transmitted among a plurality of nodes. SOLUTION: In an acoustic signal processing apparatus which includes two sets of receiving I/F and transmission I/F, connects one set of receiving I/F and transmission I/F to one set of transmission I/F and receiving I/F of another processing apparatus, and constitutes a network system to transmit the acoustic signal by circulating a packet including data of the acoustic signal among the processing apparatus, the packet received by each receiving I/F is transmitted from the transmission I/F of another set when the acoustic signal processing apparatus is connected to form a loop, and the packet received by the receiving I/F of a set whose connection is not disconnected is moved to allow transmission from the transmission I/F of the same set according to the detection of the disconnection when the connection of any set is disconnected. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
The system comprises a cabling fault detection unit that is designed so that it can be coupled to a protocol bus in order to measure its electrical properties and a cabling fault diagnosis manager that is coupled to the detection unit and uses the measured electrical properties for cabling fault identification. Independent claims are made for: (1) a method for detection of cabling faults; (2) a system for detection of cabling faults in a process control system with a user interface for a workstation or similar.