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Communications device with adaptive scanner for process control

  • US 10,007,258 B2
  • Filed: 08/11/2015
  • Issued: 06/26/2018
  • Est. Priority Date: 08/11/2015
  • Status: Active Grant
First Claim
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1. A method of process control within an industrial plant (plant), comprising:

  • providing in said plant a process control system including a first field device associated with first processing equipment for sensing a first process parameter and at least a second field device associated with second processing equipment for sensing a second process parameter, wherein said first field device and said second field device are both communicably coupled to a host computer by a communications path including a shared field communications channel portion (shared communications channel) that terminates at a communications device which includes a processor having an associated memory which implements an adaptive scan period determination algorithm stored in said memory (adaptive scanner);

    said adaptive scanner adaptively determining individual scan periods including a first scan period for said first field device and a second scan period that is not equal to said first scan period for said second field device, wherein said first scan period is determined using field data values received from said first field device including a first process parameter, field communication requests and operational commands from said host computer, and wherein said second scan period is determined using field data values received from said second field device including a second process parameter, and said field communication requests and said operational commands from said host computer, andsaid host computer monitoring operations in said plant using sampled data provided by said communications device including data based on said first process parameter provided at said first scan period and said second process parameter provided at said second scan period.

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