ALEXANDRIA, Va., March 19 -- United States Patent no. 12,253,847, issued on March 18, was assigned to TMEIC Corp. (Tokyo).
"Plant monitoring and control system" was invented by Vittal Rao (Tokyo), Akira Nojima (Tokyo), Nobuo Shimizu (Tokyo) and Ryo Shimizu (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "When a general-purpose operation part (22, 23) is hidden by a window part (24), it becomes hard for an operator to visually check an association state between a field device (10A, 10B) and a hardware switch (3). If such a display state has occurred, an HMI server (5) stops a health check signal which is being output to a PLC (6). The PLC (6) detects the stop of the health check signal and forcibly cance...