Question

Project 2: Designing an Automated Liquid Mixing System (40 points) This project is to develop an automatic liquid mixing system shown in Figure 2. This mixing system is controlled by the mixer motor (PLC output Y3) to mix two different liquids from two valves YO and YI). The mixing liquid is discharged from the valve controlled by Y2. X1 and X2 represent the low and high level sensor switch inputs, respectively. You need to complete the following tasks: (1) Normally open start and stop pushbuttons (K1 and K2 which are connected to PLC inputs X3 and X4) are used to start and stop the process at any time (2) When the start button is pressed, valve YO energizes to start filling liquid A into the tank until the low level sensor switch (XI, please use KP1 to mimic this sensor) closes. (3) After the low level sensor switch is closed, valve YO is turned off and valve Y1 energizes to start filling liquid B into the tank until the high level sensor switch (X2, please use (4) After the high level sensor switch is closed, valve Y1 is turned off. The mixer motor Y3 (5) After 15 seconds, the mixer motor Y3 stops and the mixing liquid is discharged from the (6) After 20 seconds, the valve Y2 stops. Now, the tank is empty and the low and high level KP2 to mimic this sensor) closes. then starts automatically and runs for a total of 15 seconds to mix liquids A and B. valve Y2 for a total of 20 seconds sensor switches are open. Mixer YO Liquid A High Level Sensor Switch Y1 Liquid B Low Level Sensor Switch X1 Y2 Mixing Liquid Figure 2. An automatic liquid mixing system.

Answer 1

Date: 1:11 3 5i/2 B3.o 63た 任Ho 2. 41 83fo

咚チ凑. age No.: Daie: I Peet 200N Ccum c Valie