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1. (WO2015043816) FIELD DEVICE FOR DETERMINING AND/OR MONITORING A PROCESS VARIABLE

Pub. No.:    WO/2015/043816    International Application No.:    PCT/EP2014/067230
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Wed Aug 13 01:59:59 CEST 2014
IPC: G05B 19/042
Applicants: ENDRESS+HAUSER GMBH+CO. KG
Inventors: SCHÄUBLE, Harald
GIRARDEY, Romuald
GERWIG, Simon
BAUER, Max
Title: FIELD DEVICE FOR DETERMINING AND/OR MONITORING A PROCESS VARIABLE
Abstract:
The invention relates to a field device (1) for determining or monitoring a process variable in automation technology, comprising a bistable display apparatus (2), which is used to display information of the field device (1) and/or of the process variable, wherein the display apparatus (2) is connected to main electronics (4) of the field device (1) by means of a supply line (3) and wherein the main electronics (4) supply the display apparatus (2) with energy in the online state of the field device (1), wherein the display apparatus (2) comprises a display controller (5), which is connected to the main electronics (4) by means of a data bus (6), and the main electronics (4) send the information to the display controller (5) at a specified time interval in the online state in order to display said information on a display (7) of the display apparatus (2), wherein an energy store (8) is provided, which supplies the bistable display apparatus (2) with energy in the offline state of the field device (1) such that the display controller (5) switches the display (7) to a defined display state (9) instead of the last displayed information of the field device (1) and/or of the process variable.