Display device for process automation
AssigneeKROHNE Messtechnik GmbH
InventorChristian Koch
Life of this patent
Estimating the term…
Abstract
A display device for process automation includes a display unit, a controller, a current loop interface and a fieldbus interface. The display device is designed for power supply via the current loop interface, and the controller is designed to assign an analog coded signal of an output data present at the current loop interface to a first input data and to display the first input data via the display unit. The controller is designed to request the transmission of the output data in the form of a digitally coded signal via the fieldbus interface, to receive the digitally coded signal via the fieldbus interface, to assign the digitally coded signal to a second input data, to perform a comparison between the first input data and the second input data, and to display a result of the comparison via the display unit.
Claims19
A process automation display device for monitoring signals transmitted on a current loop by a field device, the display device comprising:
- a display unit;
- a controller;
- a current loop interface;
- and
- a fieldbus interface;
- wherein the display device is designed for power supply via the current loop interface;
- wherein the controller is designed to:
- receive, via the current loop interface, an analog signal transmitted on the current loop by the field device, the analog signal including an analog coded value;
- generate a first input data corresponding to the analog coded value;
- display the first input data via the display unit;
- transmit a request to the field device via the fieldbus interface, the request causing the field device to transmit on the current loop a digital signal including a digital coded value, wherein the digital coded value and the analog coded value each correspond to a same actual value measured by the field device;
- receive, via the fieldbus interface, the digital signal transmitted from the field device to the current loop;
- generate a second input data corresponding to the digital coded value;
- perform a comparison between the first input data and the second input data;
- and
- display a result of the comparison via the display unit.
A process automation display device for monitoring signals transmitted on a current loop by a field device, the display device comprising:
- a terminal interface configured to be electrically connected to the current loop;
- a controller electrically connected to the terminal interface, the controller configured to receive power from the current loop via the terminal interface, and configured for two-way communication with the field device via the terminal interface and the current loop;
- a display unit electrically connected to the terminal interface and the controller, the display unit configured to receive power from the current loop via the terminal interface, and configured to receive display data from the controller;
- wherein the controller is configured to:
- receive, via the terminal interface, an analog signal transmitted on the current loop by the field device, the analog signal including an analog coded value;
- generate a first input data corresponding to the analog coded value;
- transmit a request signal to the field device via the terminal interface and the current loop, the request signal causing the field device to transmit on the current loop a digital signal including a digital coded value, wherein the digital coded value and the analog coded value each correspond to a same actual value measured by the field device;
- receive, via the terminal interface, the digital signal transmitted on the current loop by the field device;
- generate a second input data corresponding to the digital coded value;
- generate display data for transmission to the display unit, the display data including a result of a comparison between a first input data and the second input data.
Dependencies are inferred from the claim text.