Patent · US Expired

Method for monitoring an output unit

US6650950B2 · kind B2 · utility

0Cited by

5References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Hartmut Schuetz · Heroldsbach, DE
Andrea Ringler · Pegnitz, DE
Manfred Mueller · Eindhoven, NL
Johann Schinnerl · Graz, AT

Key dates

Filing date	May 9, 2001
Grant date	Nov 18, 2003
Priority date	—
Expiry date	Nov 15, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG05B19/058
WIPO fieldControl
WIPO sectorInstruments

Abstract

A method for monitoring the output function of an output unit (9). In particular, the output unit is a binary output unit of a safety-oriented programmable logic controller, which controls actuators (11) of an external technical process. The output function of the output unit (9) is monitored within a predetermined time interval by using bit patterns, which are produced by the external technical process, and by using bit patterns, which have not been transmitted by the output unit (9) to the actuators (11) of the external technical process. Therein, the number of output test bit patterns is reduced to a necessary minimum.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.