PROCESS INPUT/OUTPUT DEVICE DIAGNOSIS SYSTEM, PROCESS INPUT/OUTPUT CONTROL APPARATUS AND PROCESS INPUT/OUTPUT DEVICE DIAGNOSIS METHOD

摘要

PROBLEM TO BE SOLVED: To present the accuracy of a process input/output device precisely by verifying robustness of the process input/output device during operation of plant equipment.;SOLUTION: A reference signal reader 20 reads an analog signal from plant equipment 2 in response to a read request and outputs an analog signal. A process input/output device 10 reads the analog signal from the plant equipment 2 in response to a read request, converts an analog value represented by the analog signal into a digital value through A/D conversion and outputs a digital signal representing the digital value. A diagnosis apparatus 30 outputs the read request, calculates a reference digital value from the analog value represented by the analog signal from the reference signal reader 20, calculates an error between the digital value represented by the digital signal from the process input/output device 10 and the reference digital value, generates a determination result representing whether the error is settled within a reference range, and outputs diagnosis information containing the error, the determination result and determination reference information to an output device 34.;COPYRIGHT: (C)2013,JPO&INPIT