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Process of observing process information in real time in a process control network, system of observing information for observing real-time values of process parameters in a process control network, observation process function module, and, monitor observation bus
Process of observing process information in real time in a process control network, system of observing information for observing real-time values of process parameters in a process control network, observation process function module, and, monitor observation bus
"PROCESS OF OBSERVING PROCESS INFORMATION IN REAL TIME IN A PROCESS CONTROL NETWORK, SYSTEM OF OBSERVING INFORMATION TO OBSERVE REAL TIME VALUES OF PROCESS PARAMETERS IN A PROCESS CONTROL NETWORK, OPERATION PROCESS FUNCTION MODULE, OER PROCESS FUNCTION MODULE, OBSERVATION BUS MONITOR "The present invention is directed to a process and a device for monitoring, from a central location, the current operating conditions (such as process parameter values) in a process control network that has control functions distributed. In one embodiment, the process and device of the present invention use periodic programmed communications to send signals containing, for example, measured process parameter values developed by field devices to a centralized observation device. The observation device receives the signals and stores at least one value of the process parameters, and perhaps more values if necessary, to monitor and control the process. To retrieve the stored process parameters for observation, the observation device processes messages from the human interface devices asking for the stored values of one or more of the stored parameters and then transmits response messages that contain the stored values. The human interface device can be the same device as the observation device, or it can be a separate device that communicates with the observation device using either the same or a different communication protocol as that used by the field devices to communicate. communicate with the observation device. In addition, request and response messages can be sent between devices using unscheduled queued communications.
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