Control help needed for the first and third floors elevator .

Thread Starter

chikoyi

Joined Feb 25, 2024
2
The control needed for the first and third floors is relatively simple because the elevator must always go down to reach the first floor and always go up to reach the third floor. This control can be accomplished by starting the motor up or down and permitting the appropriate limit switch to stop the motor when it reaches the designated floor. Interlocking is also a necessity to prevent the UP and DOWN motor starters from being energized at the same time. When the third-floor push button is pressed, the UP starter energizes and the elevator starts up. When it reaches the top, limit switch LS3 opens and stops the motor. At the same time, the normally open LS3 contact closes and turns on the green pilot light to indicate the elevator is on the third floor. When the first-floor push button is pressed, the DOWN starter is energized and the elevator starts moving in the downward direction. When the elevator reaches the first floor, the normally closed limit switch LS1 opens and stops the motors and the normally open LS1 limit switch closes and turns on the red pilot light. Design a control circuit that will fulfil the give requirements.

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Thread Starter

chikoyi

Joined Feb 25, 2024
2
The control needed for the first and third floors is relatively simple because the elevator must always go down to reach the first floor and always go up to reach the third floor. This control can be accomplished by starting the motor up or down and permitting the appropriate limit switch to stop the motor when it reaches the designated floor. Interlocking is also a necessity to prevent the UP and DOWN motor starters from being energized at the same time. When the third-floor push button is pressed, the UP starter energizes and the elevator starts up. When it reaches the top, limit switch LS3 opens and stops the motor. At the same time, the normally open LS3 contact closes and turns on the green pilot light to indicate the elevator is on the third floor. When the first-floor push button is pressed, the DOWN starter is energized and the elevator starts moving in the downward direction. When the elevator reaches the first floor, the normally closed limit switch LS1 opens and stops the motors and the normally open LS1 limit switch closes and turns on the red pilot light. Design a control circuit that will fulfil the give requirements.

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I need help about that
 
I take it that both of you go to the same school, have the same assignment, and since neither of you have presented any attempt to even get started, simply want someone else to do your work for you?
It's not like that am attempting right now am getting lost somehow
 

MisterBill2

Joined Jan 23, 2018
18,584
What is needed here is a state machine arrangement, and then the analysis of what actions are required to move from one state to another state. Thus latching circuits will be needed for the call to each state, as well as to show the present state. That will allow creating the required circuits in a logical manner.
Creating the actual circuits will be much simpler when the required actions are clearly known. So now you have the approach provided, but I did not do the design for you.
 
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