Anywire Corporation

Mitsubishi Electric Corporation

Youichi Hoshi

Kenji Nishikido

Kazuo Itani

Shotaro Kusumoto

Mitsuhiro Tsunoo

Shigeru Hiroi

Hidemi Yamazaki

A management data region including a plurality of pulse-like signals is included in a series of pulse-like signals output from the master station to the common data signal line, and different from a control/monitoring data region including data of a control data signal and data of a monitoring data signal. Further, when data corresponding to a signal level of an input part is larger than a lower limit threshold value and smaller than an upper limit threshold value, an abnormal state is determined to have occurred, a low sensitivity state of a signal of an input part is detected based on the determination result of the abnormal state, and a signal configuring data indicating the low sensitivity state is superimposed on the management data region.

Method for detecting abnormality of input signal and slave station for use in same

A management data area including a plurality of pulsed signals is provided in a series of pulsed signals outputted from the main station to the common data signal line, the area being different from a control/monitoring data area including data of a control data signal and data of a monitoring data signal. The substation sets random number data generated by its own station as an original number, generates pieces of comparison/collation data having a plurality of bits based on the original number, and superimposes a signal including the pieces of comparison/collation data on the management data area. The main station determines existence of address overlap of the substations based on a result of comparing the pieces of comparison/collation data complying with a predetermined rule.

Transmission line address overlap detection system and substation terminal used in the system

A transmission signal transmitted via a common data signal line, includes a management data region different from a control/monitoring data region including data of control data and monitoring data signals. The slave station acquires input information from an input part corresponding to its own station, acquires control data for reference by an output part of another station in a correspondence relation with the input part from the transmission signal, and obtains a pseudo output change timing equal to a true output change timing of the output part based on the control data. A signal configuring data indicating a first failure state when a time difference between the pseudo output change timing and an input change timing of the input part is smaller than a first threshold value or a second failure state when the time difference is larger than a second threshold value is superimposed on the management data region.

Method for detecting failure and slave station for use in same

A control/monitor signal transmission system that employs a transmission synchronization scheme in which a master station connected to a single control unit and a plurality of slave stations corresponding to a plurality of controlled apparatuses synchronize with each other through a transmission clock and data is transmitted therebetween over a common data signal line, a transmission line disconnection detection method that enables a disconnection of a transmission line to be detected precisely; and a slave station that is used for this method. A continuous pulse signal that the master station outputs to the common data signal line is provided with a management data region that includes a plurality of pulse signals and that differs from a control/monitor data region including data of a control data signal and data of a monitor data signal.

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Kyoto, Japan

Youichi Hoshi