# US 12,111,367 B2 · Cable abnormality assessment system, slave device, and cable abnormality assessment method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,367 B2 - Document ID: US12111367B2 - Status: Granted - Kind: B2 - Application number: 17/797,728 - Filed: 2021-02-09 - Published: 2023-03-02 - Granted: 2024-10-08 - Earliest claimed: 2020-03-06 - Assignees: OMRON Corporation - Applicants: OMRON Corporation - Inventors: Takashi Takeda - Web page: https://patentgrep.com/patent/US12111367B2 ## CPC - G01R 31/58: Testing of lines, cables or conductors (testing of electric windings G01R31/72) - G05B 19/042: using digital processors (G05B19/05 takes precedence) - H04B 3/46: Monitoring; Testing - H04L 25/02: Details {; arrangements for supplying electrical power along data transmission lines (systems for transmitting signals via power distribution lines H04B3/54)} - H04L 67/12: specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks - H04L 69/40: for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection (management of faults, events, alarms or notifications in data switching networks H04L41/06) - G05B 23/0256: {injecting test signals and analyzing monitored process response, e.g. injecting the test signal while interrupting the normal operation of the monitored system; superimposing the test signal onto a control signal during normal operation of the monitored system} - G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12) - G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The invention provides a cable abnormality assessment system, a slave device, and a cable abnormality assessment method. A cable abnormality assessment system is provided with a diagnosis control unit for assessing a cable abnormality on the basis of link-up information between a communication unit and another machine connected to the other end of a cable, and first and second information that are the respective results of abnormality diagnosis by a signal line diagnosis unit with regard to one and the other of two pair signal lines of the cable. ## Claims ### Claim 1 A cable abnormality assessment system, comprising: a communication unit provided in a slave device controlled by a master device; and a diagnosis control unit, wherein the communication unit comprises a signal line diagnosis unit that performs, by transmitting a pulse to a pair signal line of a cable connected and detecting a reflection wave, an abnormality diagnosis of the pair signal line, and the diagnosis control unit performs an abnormality assessment of the cable based on: link-up information on whether or not there is a link-up between the communication unit and an another machine connected to the other end of the cable; first information that is an abnormality diagnosis result by the signal line diagnosis unit for one pair signal line of two pair signal lines of the cable; and second information that is an abnormality diagnosis result by the signal line diagnosis unit for the other pair signal line of the two pair signal lines of the cable, if the link up information is information indicating that there is a link-up between the communication unit and the another machine, the diagnosis control unit determines that the cable is normal, if the link-up information is information indicating that there is not a link-up between the communication unit and the another machine, the signal line diagnosis unit performs the abnormality diagnosis for the one pair signal line and the abnormality diagnosis for the other pair of signal line, and if at least either the first information or the second information is disconnected or short-circuited, the diagnosis control unit determines that the cable is disconnected or short-circuited, and determines that the cable is normal if both the first information and the second information are normal. ### Claim 2 (depends on 1) The cable abnormality assessment system according to claim 1, wherein the abnormality diagnosis result by the signal line diagnosis unit is any of normal, short-circuited, disconnected, and undiagnosable. ### Claim 3 (depends on 2) The cable abnormality assessment system according to claim 2, wherein the diagnosis control unit is provided in the slave device. ### Claim 4 (depends on 2) The cable abnormality assessment system according to claim 2, composed of the slave device and a control computer, wherein the diagnosis control unit is provided in the control computer. ### Claim 5 (depends on 1) The cable abnormality assessment system according to claim 1, wherein the diagnosis control unit is provided in the slave device. ### Claim 6 (depends on 1) The cable abnormality assessment system according to claim 1, composed of the slave device and a control computer, wherein the diagnosis control unit is provided in the control computer. ### Claim 7 A slave device controlled by a master device, the slave device comprising: a communication unit; and a diagnosis control unit, wherein the communication unit comprises a signal line diagnosis unit that performs, by transmitting a pulse to a pair signal line of a cable connected and detecting a reflection wave, an abnormality diagnosis of the pair signal line, and the diagnosis control unit performs an abnormality assessment of the cable based on: link-up information on whether or not there is a link-up between the communication unit and an another machine connected to the other end of the cable; first information that is an abnormality diagnosis result by the signal line diagnosis unit for one pair signal line of two pair signal lines of the cable; and second information that is an abnormality diagnosis result by the signal line diagnosis unit for the other pair signal line of the two pair signal lines of the cable, if the link up information is information indicating that there is a link-up between the communication unit and the another machine, the diagnosis control unit determines that the cable is normal, if the link-up information is information indicating that there is not a link-up between the communication unit and the another machine, the signal line diagnosis unit performs the abnormality diagnosis for the one pair signal line and the abnormality diagnosis for the other pair of signal line, and if at least either the first information or the second information is disconnected or short-circuited, the diagnosis control unit determines that the cable is disconnected or short-circuited, and determines that the cable is normal if both the first information and the second information are normal. ### Claim 8 A cable abnormality assessment method, using a signal line diagnosis that performs, by transmitting a pulse to a pair signal line of a cable and detecting a reflection wave, an abnormality diagnosis of the pair signal line, wherein the cable abnormality assessment method comprising: a step to obtain a link-up information on whether or not there is a link-up through the cable; a first step to determine that the cable is normal when the link-up information is information that there is link-up; and a second step to determine the cable when the link-up information is information that there is no link-up, the second step comprises: a sub-step to execute the signal line diagnosis for one pair signal line of two pair signal lines of the cable and obtain a first information that is an abnormality diagnosis result; a sub-step to execute the signal line diagnosis for the other pair signal line of the two pair signal lines of the cable and obtain a second information that is an abnormality diagnosis result, and a sub-step to determine that the cable is disconnected or short-circuited if at least either the first information or the second information is disconnected or short-circuited, and determine that the cable is normal if both the first information and the second information are normal.