Transmission line address duplication detection method and substation terminal used for same method

Abstract

Provided are a transmission line address duplication detection method and a substation terminal used for the same method which are capable of accurately detecting disconnection of a transmission line in a control / monitoring signal transmission system that adopts a transmission synchronization method synchronizing a primary station connected to a single control unit with a plurality of substations corresponding to a plurality of controlled devices using a transmit clock, and that performs data transmission via a shared data signal line. In a series of pulsed signals output from a primary station to shared data signal lines, management data areas are established that are configured by a plurality of pulsed signals, which are different from control / monitoring data areas that are configured by data of a control data signal and data of a monitoring data signal. The substations treat random number data generated at the stations themselves as original numbers, and on the basis of the original numbers, generate a plurality of comparative check-use data comprising a plurality of bits of data. Signals comprising the plurality of comparative check-use data are superimposed on the management data areas, whereupon the primary station assesses the presence or absence of address duplication at the plurality of substations on the basis of results of comparing the plurality of comparative check-use data in accordance with a predetermined convention.

Description

technical field [0001] The present invention relates to a transmission line address duplication detection method for detecting disconnection of a transmission line in a control / monitoring signal transmission system and a substation terminal used in the method, wherein the control / monitoring signal transmission system adopts a transmission synchronization method , That is, the signal lines between the master station connected to a single control unit and the multiple sub-sites corresponding to multiple controlled devices are reduced in wiring, connected by a common data signal line, and via the common data signal Line, use the transmission clock to synchronize and transmit data. Background technique [0002] In a control system with a single control unit and multiple controlled devices (consisting of a controlled unit that operates in response to instructions from the control unit and a sensor unit that sends information to the control unit), the number of wiring can be reduc...

AI Technical Summary

Problems solved by technology

However, in the command method, there is a problem that if the command data (address data) becomes large relative to the amount of data to be transferred, the transfer efficiency decreases

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