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Control system monitor

  • US 5,726,912 A
  • Filed: 09/06/1996
  • Issued: 03/10/1998
  • Est. Priority Date: 09/06/1996
  • Status: Expired due to Fees
First Claim
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1. In a process control system (PCS), having a control network and a plurality of nodes coupled to the control network, the PCS controlling a process, a monitoring system operatively connected to said PCS for obtaining predetermined data of the PCS to monitor the performance of the PCS, the monitoring system comprising:

  • a) a first computer system operatively connected to the control network located in physical proximity to the PCS, for obtaining the predetermined data of the PCS on a periodic basis in accordance with a predetermined protocol of the control network, the first computer system arranged to assess the predetermined data obtained from the PCS and to generate an alarm when an alarm condition of the PCS is indicated;

    b) a second computer system, located remotely from the PCS, for receiving the predetermined data, the predetermined data of the PCS being transferred from the first computer system to the second computer system, the transfer being initiated by the first computer system when an alarm condition of the PCS is indicated by the predetermined data; and

    c) a communication line, operatively connected to the first and second computer systems, for providing a communication link between said first and second computer systems.

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