The process shown in figure 1 involves pumping fluid from Tank A to Tank B. The operation of the process can be described as follows, Before starting, PS1 must be closed. When the start button is pushed, the pump starts. The button can then be released and the pump continues to operate. When the stop button is pushed, the pump stops. PS2 and PS3 must be closed 8s after the pump starts. If either PS2 or PS3 opens, the pump will shutoff and will not be able to start again for another 15 s. For the above mentioned conditions develop a ladder program using direct method and provide the allocation list. PS1 PS2 PS3 Tank Tank Pump

Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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The process shown in figure 1 involves pumping fluid from Tank A to Tank B. The operation of the process can be
described as follows,
Before starting, PS1 must be closed.
When the start button is pushed, the pump starts. The button can then be released and the pump
continues to operate.
When the stop button is pushed, the pump stops.
PS2 and PS3 must be closed 8s after the pump starts.
If either PS2 or PS3 opens, the pump will shutoff and will not be able to start again for another 15 s.
For the above mentioned conditions develop a ladder program using direct method and provide the allocation list.
PS1 PS2 PS3
Tank
Tank
Pump
Figure 1
B.
Transcribed Image Text:The process shown in figure 1 involves pumping fluid from Tank A to Tank B. The operation of the process can be described as follows, Before starting, PS1 must be closed. When the start button is pushed, the pump starts. The button can then be released and the pump continues to operate. When the stop button is pushed, the pump stops. PS2 and PS3 must be closed 8s after the pump starts. If either PS2 or PS3 opens, the pump will shutoff and will not be able to start again for another 15 s. For the above mentioned conditions develop a ladder program using direct method and provide the allocation list. PS1 PS2 PS3 Tank Tank Pump Figure 1 B.
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