Apparatus and method for the protection and for the non-destructive testing of safety-relevant registers
AssigneeInfineon Technologies AG
InventorHolger Busch
Life of this patent
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Abstract
The present invention enables a safety management of safety measures as well as the non-destructive testing of safety-relevant registers which are required for the configuration of a system, wherein the test method according to the invention can be carried out during each operating phase of a system to be tested.
Claims20
A method for a test of safety registers of an electronic control system which comprises a number of modules and is configured to trigger a safety function under given conditions, comprising:
- associating a test controller with each of the number of modules, respectively;
- in safety registers to be tested, storing test data in encapsulated assignments in order to invert the original values in a redundant or duplicated safety register and thereby trigger predefined safety functions;
- and
- detecting an occurrence of an error in one of the safety registers in each operating phase of the control system via the associated test controllers that are provided in each module which comprises such safety registers.
A method for a test of safety registers of an electronic control system which comprises a number of modules and is configured to trigger a safety function under given conditions, comprising:
- associating a test controller with each of the number of modules, respectively;
- storing an original value of a safety register in a redundant or duplicated safety registers prior to beginning of the test;
- changing a data content of the redundant or duplicated safety register at least once to simulate conditions for the triggering of a safety function of the control system in order to check whether the safety function of the control system is triggered according to the given conditions;
- detecting an occurrence of an error in one of the safety registers in each operating phase of the control system via the associated test controllers that are provided in each module which comprises the one of the safety registers;
- and
- writing back a data content that is written back from the redundant or duplicated register to the tested safety register after the test in order to restore original data content of the tested safety register.
An apparatus comprising:
- a memory configured to store executable instructions;
- and
- a number of modules comprising safety registers and at least one test controller, coupled to the memory, configured to facilitate execution of the executable instructions to perform operations to at least:
- compare a generated or incoming indication for triggering of a safety function, via a test control logic, with an expected indication for a triggering of a safety function;
- generate global test alarm and alarm signals that are forwarded to a safety management unit;
- and
- detect an occurrence of an error in one of the safety registers in each operating phase of the control system.
Dependencies are inferred from the claim text.