Resources Contact Us Home
Industrial controller with coordinated timing

Image Number 3 for United States Patent #5519726.

A method for providing a standard coordinated time throughout spatially separated functional modules of an industrial controller employs a module operating as a time-master which transmits a coordinated time value to various dependent modules through communication modules. The particular time-master is determined by an arbitration process among potential masters which examines a time quality value, indicating the precision of the time-master's clock, and incorporated in the transmitted synchronization signal. Upon the loss of a master or the introduction of a new master, mastership is reallocated so that the master time value is provided from that module having the best time quality. Offset caused by "ripple through" of the time value through communication modules is minimized by summing to that time value as it traverses a communication module with a time quantity measuring the processing time of the communication module.

  Recently Added Patents
Customizing a range of acceptable tape dimensional stability write conditions
Apparatus and method for layered decoding in a communication system using low-density parity-check codes
Wine bottle
Performing a cyclic redundancy checksum operation responsive to a user-level instruction
Computer implemented apparatus for generating and filtering creative proposal
Apparatus and method for masking a clock signal
Polishing composition
  Randomly Featured Patents
Morphological analyzer, natural language processor, morphological analysis method and program
Aircraft optimization indicia and the use thereof
Power generating wind turbine
Stroboscopic scanning electron microscope
System and method for automated design verification
Large-vocabulary speech recognition using an integrated syntactic and semantic statistical language model
Method for making extruded mounted food product
Developing applications online
Soundhead restore mechanism for use in a disc machine
Communications system and communication method for data multiplexing