Hello, i am trying to get a better understanding on relay logic. i just got my foot in the elevator field and noticed plc's are widely used. i created a scenario and solved it using relay logic. i would like your input to see if you can find any problems with this diagram. Thank you.

Scenario:
Create a 2 floor lift that has the following:
1.Hall stop switch
2.Top and bottom final limits (TF & BF) (used to stop the lift level to door zone)
3.Door locks (DL) ( Hall door interlock//Lift cannot move unless DL contacts are made)
4.Gate Switch (GS) ( Lift door interlock//Lift cannot move unless GS contacts are made)

Notes:
-Gate switch,Door locks and Stop switch are considered safeties. if any of the safeties are open the lift will not move.
-Lifts are not passenger cars, so there will be no personnel in the lift( meaning no inputs are required inside)

My question: Do you notice a problem? Any suggestions on how to better improve this scenario/diagram?

 

Looks reasonable to me, It is usual to fit the motor overload detection contacts in the 1CR and 2CR strings.
The stop button would need to be push to latch - turn to release, not momentary.
A master control relay would be better maybe.
See PDF.
Max.

 

and what about speed slow system? and how we slow the lift can u draw another drawing, kindly.