Verfahren und Vorrichtung zur Steuerung von analogem Ausgangsstrom

Details

Veröffentlichungs-Nr.

EP2595018

Aktenzeichen

EP12153371

Anmeldetag

31. Januar 2012

Veröffentlichung

23. Januar 2019

Erteilung

23. Januar 2019

Rechtsraum

EP

IPC

G05B19/042G05B9/03

Abstract

This invention relates to an apparatus and method for output current control in an Industrial Process Control System. The output module comprises two management units each of which calculates the current demand for the module independently from one another. One management unit controls an output current controller whilst the other unit monitors the current produced by the output current controller against an independently calculated demand. The output module has multiple output modules. However rather than one module providing a backup for the other modules, or alternating between use of each module, in normal operation, each module provides a portion of the required output current, the total output current being equal to the sum of the currents output by each module. In the event of failure on one of the modules, the other module or modules switch to providing the total current required and the failed module is switched to a fail safe mode by using an isolation circuit to switch off the output current from that module.

Anmelder

Firma

Rockwell Automation Limited

Land

🇬🇧 Großbritannien

Fachgebiete