SYSTEM AND METHOD FOR IMPLEMENTING TIME SYNCHRONIZATION MONITORING AND DETECTION IN A SAFETY INSTRUMENTED SYSTEM
First Claim
Patent Images
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.
0 Assignments
0 Petitions
Accused Products
Abstract
An apparatus, system and process is provided from 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.
110 Citations
2 Claims
-
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.
-
-
2-19. -19. (canceled)
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeJohn Carl Gabler, Joseph D. Duffy, Ram Ramachandran
-
Original AssigneeJohn Carl Gabler, Joseph D. Duffy, Ram Ramachandran
-
InventorsRamachandran, Ram, Gabler, John Carl, Duffy, Joseph D.
-
Application NumberUS12/343,093Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current700/79CPC Class CodesG06F 1/12 Synchronisation of differen...
