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The designer needs for...... conditional output boxes for drawing the ASM-chart for the controller of the aforementioned system.

The designer needs for...... conditional output boxes for drawing the ASM-chart for the controller of the aforementioned system.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Consider a neutralization system with the piping and instrumentation diagram (P & ID) in the figure below, where a certain amount of solution is added to a tank chemically treated and then sent out to the next tank. The sensors ts & as are used to sense the temperature and PH of neutralized solution, respectively. The level switches (Is1, Is2, and Is3) are activated whenever the level in the tank is at or above a given level. The neutralization process is to proceed as follows: 1. Initially, all the valves are closed, the mixer (m) and heater (h) are OFF, and the reaction tank is empty. 2. When the START button is pressed, open (V1) until (1s2) is activated. This fills the tank with the solution to be neutralized. 3. When the solution level rises above (Is2), start the mixer (m) and turn on the heater (h). When the level drops below (Is1), stop the mixer (m). 4. Whenever the PH of the solution is unbalanced, open (V2) to add neutralizer. 5. If the tank becomes full, which is indicated by the activation of (Is3), close (V2) to stop the inflow of neutralizer. Next open (V4) to reduce the level of solution to the point indicated by (Is2). Then close (V4). 6. When both the temperature and PH of the solution are correct, then turn off the heater, close (V2), and open (V3) to drain the tank. When the tank is empty, indicated by the activation of (Is1), close (V3) and proceed with step-1. In addition to the above control sequence, two indicator lights, (tl and al), are regulated. Lights (tl and al) should turn on whenever the solution level is above (Is2), temperature, and PH have reached their preset values. The designer needs for...... conditional output boxes for drawing the ASM-chart for the controller of the aforementioned system. °° 6 7
Transcribed Image Text:Consider a neutralization system with the piping and instrumentation diagram (P & ID) in the figure below, where a certain amount of solution is added to a tank chemically treated and then sent out to the next tank. The sensors ts & as are used to sense the temperature and PH of neutralized solution, respectively. The level switches (Is1, Is2, and Is3) are activated whenever the level in the tank is at or above a given level. The neutralization process is to proceed as follows: 1. Initially, all the valves are closed, the mixer (m) and heater (h) are OFF, and the reaction tank is empty. 2. When the START button is pressed, open (V1) until (1s2) is activated. This fills the tank with the solution to be neutralized. 3. When the solution level rises above (Is2), start the mixer (m) and turn on the heater (h). When the level drops below (Is1), stop the mixer (m). 4. Whenever the PH of the solution is unbalanced, open (V2) to add neutralizer. 5. If the tank becomes full, which is indicated by the activation of (Is3), close (V2) to stop the inflow of neutralizer. Next open (V4) to reduce the level of solution to the point indicated by (Is2). Then close (V4). 6. When both the temperature and PH of the solution are correct, then turn off the heater, close (V2), and open (V3) to drain the tank. When the tank is empty, indicated by the activation of (Is1), close (V3) and proceed with step-1. In addition to the above control sequence, two indicator lights, (tl and al), are regulated. Lights (tl and al) should turn on whenever the solution level is above (Is2), temperature, and PH have reached their preset values. The designer needs for...... conditional output boxes for drawing the ASM-chart for the controller of the aforementioned system. °° 6 7
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