IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0642498
(2006-12-19)
|
등록번호 |
US-7489977
(2009-02-10)
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발명자
/ 주소 |
- Duffy,Joseph D.
- Ramachandran,Ram
- Gabler,John Carl
|
출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
4 인용 특허 :
104 |
초록
▼
An apparatus, system and process is provided for communicating safety-related data, over an open system, from a sender to a receiver. Safety-related components, including function blocks, flexible function blocks, resource blocks and transducer blocks, as well as, safety-related objects are provide
An apparatus, system and process is provided for communicating safety-related data, over an open system, from a sender to a receiver. Safety-related components, including function blocks, flexible function blocks, resource blocks and transducer blocks, as well as, safety-related objects are provided. Also, a time synchronization monitor is provided for monitoring timing distributions and determining when such distributions have drifted beyond an acceptable limit.
대표청구항
▼
We claim: 1. An apparatus comprising: a processor configured to determine whether at least one message communicated over a transmission medium has not been queued by monitoring time synchronization by comparing an actual drift to an allowable drift, wherein the allowable drift is calculated by comp
We claim: 1. An apparatus comprising: a processor configured to determine whether at least one message communicated over a transmission medium has not been queued by monitoring time synchronization by comparing an actual drift to an allowable drift, wherein the allowable drift is calculated by comparing a first black channel clock determined after processing of a previous time distribution to a second safety layer clock determined after processing of a current time distribution and multiplying the result by a constant; and a medium attachment unit, which communicates the time distributions and output messages between the processor and a transmission medium. 2. The apparatus of claim 1, further comprising at least one safety-related function block. 3. The apparatus of claim 2, wherein the at least one safety-related function block receives analog input data. 4. The apparatus of claim 2, wherein the at least one safety-related function block is a Safety Instrumented System Function Block. 5. The apparatus of claim 1, further comprising a memory adapted to store at least one non-safety-related function block. 6. The apparatus of claim 1, further comprising a memory configured to store a plurality of function blocks, including a non-safety-related function block and a safety-related function block. 7. The apparatus of claim 6, wherein the non-safety-related function block and the safety-related function block are interconnected to communicate data only from the safety-related function block to the non-safety-related function block. 8. The apparatus of claim 1, wherein the transmission medium includes a digital bus. 9. The apparatus of claim 7, wherein the transmission medium includes a High Speed Ethernet network. 10. The apparatus of claim 1, wherein the processor is adapted for use with at least one of: a safety-related resource block; a first safety-related transducer block; and a second safety-related transducer block. 11. The apparatus of claim 9; wherein a safety-related resource block insulates a safety-related function block from physical hardware. 12. The apparatus of claim 9, wherein a first safety-related transducer block decouples an input to a safety-related function block, and a second safety-related transducer decouples an output of the safety-related function block. 13. The apparatus of claim 1, wherein the output message is at least Safety Intensity Level-1 compliant. 14. The apparatus of claim 1, wherein the output message is at least Safety Intensity Level-2 compliant. 15. The apparatus of claim 1, wherein the output message is at least Safety Intensity Level-3 compliant. 16. The apparatus of claim 1, wherein the processor generates a virtual protocol data unit prior to communication of the output message. 17. The apparatus of claim 1, wherein the transmission medium further comprises a black channel. 18. The apparatus of claim 1, wherein the transmission medium further comprises a high speed Ethernet. 19. The apparatus of claim 1, further comprising a diagnostic transducer block.
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