STIMULATED SIMULATOR FOR A DISTRIBUTED PROCESS CONTROL SYSTEM

摘要

PURPOSE: A stimulated simulator is provided to very well emulate real time acknowledgement and simulate the operation of process controlled by a distributed process control system. CONSTITUTION: A simulator for a distributed process control system has a distributed process instrumentation and control system with a plurality of distributed process units(DPUs). A plant modeling computer emulates a process responsive to a control signal generated by DPUs running actual process control software and generates a process signal forming of the sensor signal. A data highway such as in the actual system provides communications between the DPUs and between the DPUs and operator stations which provide operator signals used by the DPUs. As an interface between the plant modeling computer and the instrumentation and control system, a simulator station communicates with the plant modeling computer through reflective memory in the interface and the plant modeling computer, and is also connected to the operator stations by the data highway for receiving the operator signals which can include signals controlling simulator operation. The simulator station memory maps sensor signals through reflective memory directly to a memory mapped input/output interface of each DPU at the scan rate, or a multiple of the scan rate, of the DPU, and provides the control signals generated by the DPUs to the plant modeling computer at the same rates.