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This tutorial assumes that you have completed the exercises of tutorials 1 and 2 successfully. In this particular tutorial, we will focus on the order of rules and states in Process Controller. The subsequent tutorial will focus on interfacing pumps, valves and sensors with states in Process Controller.
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As a quick exercise, make a rule for the "Settle" state that if the time exceeds 300 30 seconds then switch back to the "Add Chemical" state.
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For the "Settle" state, we wish to turn off the pump and turn off the valve that releases chemical, and we wish to turn on the keep "Drain Valve" OFF. " Do this and then confirm that your edited state looks like the one in the figure below.
Step Six: Check the Stamp Box
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We're not done yet! Your next task is to add another state "Drain" to drain the experiment. Set the time for the drain state not to exceed 10 100 s. You should then set the order of processes to be "Add Chemical" state switching to the "Settle" state switching to the "Drain" state. The "Drain" state should then switch back to "Add Chemical" state. In this sense, we are creating a cyclical process that could run indefinitely. In the "Drain" state set the "Drain Valve" to ON.
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