| 摘要 |
A method for checking an installation location of a component in a failsafe automation system, wherein the components are connected to one another in series and uniquely defined addresses are continuously assigned from a first component to successor components, wherein, after the assignment of addresses to the components, a switching device is operated in the components such that a signal transit time measurement is performed incrementally with a test signal for each successor component, and wherein the test signal is emitted and re-received and the installation location of the successor component is check based on the time difference. |
| 主权项 |
1. A method for checking an installation location of a component in as failsafe automation system, comprising:
connecting a plurality of components to one another in series; assigning, continuously, uniquely defined addresses from a first component of the plurality of components to successor components of the plurality of components, the first component being connected directly to a second component, and further successor components of the plurality of components each being connected to their predecessor components, said assigning the uniquely defined addresses comprising: a) transmitting, by the first component, a uniquely defined address to the second component of the plurality of components, the second component being operated such that a communication to its successor component is interrupted; b) transmitting, by the second component, a signal to the first component, the transmitted signal informing the first component that a valid address has been assigned; c) transmitting, by the first component, a switching instruction to the second component, the second component being subsequently operated such that communication with its successor component is possible; d) transmitting, by the first component, a further uniquely defined address to the successor component which is operated such that communication to its successor component is interrupted; e) continuing according to step b), the second component mentioned in step b) being the successor component from step d) and the first component proceeding with respect to the successor component according to step c); and f) repeating step e) until no successor component is present, and informing the first component that no successor component is present by a timeout signal from a last component successor; and operating a switching device of each of the successor components after the assignment of the addresses to the successor components such that a signal transit time measurement is performed incrementally with a test signal for each successor component, the test signal being emitted and re-received and an installation location of each of the successor components being checked based on the time difference; wherein a computational transit time with respect to an allocated address is determined for the respective successor component and is compared with a measured signal transit time, and in an event (i) that a predefinable deviation is not exceeded, the installation location of the successor component with respect to its address is considered to be valid, and otherwise (ii) one of the installation location and the address allocation is considered to be invalid such that a failsafe action is triggered which immediately switches off outputs or supplies the successor component with safe error values when the installation location of the successor component with respect to its address is considered to be valid. |
