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Apparatus and method for synchronizing dynamic process data across redundant input/output modules

  • US 9,448,952 B2
  • Filed: 07/28/2015
  • Issued: 09/20/2016
  • Est. Priority Date: 07/31/2013
  • Status: Active Grant
First Claim
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1. An apparatus comprising a first input/output (I/O) module, the first I/O module comprising:

  • a programmable device associated with a first I/O channel, the programmable device configured to implement a counter that is configured to count pulses in an input signal and output a first counter value;

    a control unit configured to sample the first counter value at the first I/O module at substantially a same time that a second counter value at a second I/O module is sampled; and

    a memory configured to store first data defining a configuration of the programmable device and second data associated with the first I/O channel, wherein the second data comprises the first counter value;

    wherein the control unit is further configured to transmit the first and second data to the second I/O module during a synchronization process.

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