EMBEDDED PROGNOSTICS ON PLC PLATFORMS FOR EQUIPMENT CONDITION MONITORING, DIAGNOSIS AND TIME-TO-FAILURE/SERVICE PREDICTION

摘要

A prognostics analysis software module is embedded in a programmable logic controller (PLC) software platform. During cycling of the PLC real-time operating program, data is read from sensors and written to a buffer only when the prognostics analysis software module is idle. The prognostics analysis software module is then activated by a system function block of the PLC software platform. Before determining any prognostic information, prediction models within the prognostics analysis software module are automatically trained using features extracted from the sensor data.