Metso Automation Oy

Mika Kreivi

Jouni Pyötsiä

Jouni Py&ouml;tsi&auml;

Pasi Heikkinen

Markus Hauhia

The invention relates to device diagnostics in industrial processes comprising field devices employing a field bus. A remote diagnostics device () is placed in connection with a process device (), separate from the field devices and the field bus. The remote diagnostics device comprises diagnostics electronics which collects diagnostics data relating to the process device, and a transmitter part for wireless () transmission of the diagnostics data to a near-by field device. The field device comprises a receiver part () for wireless () reception of the diagnostics data from said remote diagnostics device (). A field device control unit () analyses the received diagnostics data and transmits a diagnostics report over a field bus interface () and the field bus to a diagnostics computer.

Wireless diagnostic system in industrial processes

An industrial process material flow within an industrial process is controlled by a process control loop that includes a process controller, a field device controller and a field device in the process as well as process variable feedback from the process to the process controller. Both the process controller and the field device controller, such as a valve controller, are fine-tuned so that their interaction is taken into account and controller parameters, which provide an optimal control loop performance are found. This results in a significant improvement in the control loop performance, i.e., in a lower process variability, as compared with the traditional tuning method, which does not take into account the interaction between the two controllers.

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Vantaa, Finland

Mika Kreivi