[FIGURES 4 & 6 OMITTED]Next, the sequencer procedures for the subsystem (RAPS) were installed on the Al workstation and tested with the validated skills. An example of the resulting RAPs is shown in figure 7. There are several methods associated with the processing-start RAP, each indexed by a context clause. The digital method shown is valid when the required reverse-osmosis stage is purged, and the pps-select valve is open to the postprocessing systems (PPSs). In this case, the RAP starts the reverse-osmosis main feed pump, stops the recirculation pump, and turns the pps-select valve to reject (relieving downstream pressure). Then, the RAP turns the reverse-osmosis process valve to the length purge position and turns the pps-select valve to the tank position.

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