Intelligent multi-vendor diagnostics of Honeywell ST700 transmitters in a PRM environment

Modern industrial plants increasingly rely on heterogeneous field instrumentation, creating challenges for unified monitoring and diagnostics. This study presents a structured framework for integrating Honeywell ST700 pressure transmitters into Yokogawa's Plant Resource Manager (PRM) environment. A signal-mapping layer is introduced to harmonize transmitter data with PRM functions, while mathematical models describe the complete measurement chain, including sensing, signal conditioning, 420 mA transmission, HART communication, and electrical operating constraints. The diagnostic framework combines threshold monitoring, multi-device consistency analysis, residual-based fault detection, and trend evaluation to identify abrupt faults, gradual drift, sensor bias, and communication-related errors. Supply-voltage and loop-resistance limits are incorporated to ensure that only physically valid signals are used for diagnostic decisions. The proposed approach extends PRM beyond vendor-specific applications and supports consistent interpretation of measurements from non-native devices. It provides a scalable basis for reliable multi-vendor condition monitoring, reduced false alarms, and improved fault detection in complex industrial process systems.

Hali tarjima qilinmagan