Transmission line address duplication detection method and sub-site terminals used in the method

Abstract

The present invention provides a transmission line address duplication detection method capable of accurately 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 In the transfer synchronization method, a master station connected to a single control unit is synchronized with a plurality of slave stations corresponding to a plurality of controlled devices using a transfer clock, and data is transferred via a common data signal line. A management data area is provided in a series of pulse signals output from the master station to the common data signal line, and this management data area is different from the control / monitoring data area composed of control data signal data and monitor data signal data. The area is composed of multiple pulse signals. The sub-site uses the random data generated by this site as the original code, and based on the original code, generates multiple data for comparison and comparison formed by multi-bit data, and will be formed by multiple data for comparison and comparison. The signal of the control data overlaps in the management data area, and the master site judges whether or not there is any address duplication in the multiple sub-sites based on the result of comparing a plurality of data for comparison according to a predetermined definition method.

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

Images