Patent application number | Description | Published |
20100268356 | Method for Checking Suitability of a Data Processing Device for Performing Failsafe Automation Processes - A method for checking a data processing device to determine its suitability for performing failsafe automation processes, wherein the data processing device includes a first and a second time base. The method comprises determining a first time value of the first time base after expiration of a time period of length T, determining a second time value of the second time base after the expiration of the time period of length T, determining a deviation between the first and the second time value, and initiating a troubleshooting measure if the deviation undershoots, i.e., undershoots or reaches, a predefined or pre-definable limit value. | 10-21-2010 |
20110035524 | Apparatus for Plugging into a Computation System, and Computation System - An apparatus for upgrading a standard PC system to a fail-safe computation system, comprising a plug device for plugging into the computation system, a memory module, a microcontroller, and a first device for generating a first time signal, wherein the microcontroller and the first device interact such that the computation system is provided with the first time signal through the plug device device. | 02-10-2011 |
20110185217 | Method and Apparatus for the Realization of a Failsafe Time Function - A method for enabling an oscillating crystal available in a system to be used to generate a software-realized time function, and an apparatus for implementing the method, without requiring additional hardware components, wherein a periodic interrupt signal is generated by the system-internal real-time clock, a table entry with a reference to a routine in an intra-system table is accessed upon receipt of the periodic interrupt signal and a counter is formed by the routine. | 07-28-2011 |
20120174122 | Method for Testing the Real-Time Capability of an Operating System - A method that tests the real-time behavior of an operating system having a first time system (e.g., a SMI tracer real-time extension) responsible for the real-time behavior of the operating system, wherein a test routine is periodically called for execution and the actual point in time of execution of the test routine is compared with an expected periodic point in time of execution of the test routine. | 07-05-2012 |
20120266022 | Method for Verifying an Application Program in a Failsafe Programmable Logic Controller, and Programmable Logic Controller for Performing the Method - A method and a programmable logic controller (SPS) for verifying an application program in a failsafe programmable logic controller, wherein a signature (desired value) is generated using program modules or a complete application program when creating a program, and a copy of the signature is stored in the programmable logic controller and in an external component, respectively. Before the safety-oriented application program is started, the copy of the signature stored by the programmable logic controller is transmitted to the external component and is compared with the copy in the external component. In a further comparison, a signature (actual value) is generated using the content of the main memory of the programmable logic controller and using the actually loaded application program and is then compared with the local copy of the desired value of the signature. Starting of the actual application program is enabled only when both comparisons are positive. | 10-18-2012 |