(This exercise is based on LogixPro PLC simulator)
PLC Exercise: Design a PLC ladder program for two floor elevator System. Make necessary assumptions as follows:
Assumptions:
• Lift door is manual sliding type. A door switch is provided to ensure the door is properly closed.
• In first Floor there is only Down Call Button
• Inside Lift, there are Both up and down button
• In Ground Floor there is only Up Call Button
Inputs:
Function Address
Up Call Button at Ground Floor I:1/0
Down Call Button at First Floor I:1/1
Up Button inside Elevator I:1/2
Down Button inside Elevator I:1/3
Door Switch (closed when door closed) I:1/4
Elevator up limit switch I:1/5
Elevator down limit switch I:1/6
Outputs:
Function Address
Lift Motor Upward Direction O:1/0
Lift Motor Downward Direction O:1/1
Ready to open door indicator Ground Floor O:1/2
Ready to open door indicator First Floor O:1/3
Ready to open door indicator inside Lift O:1/4
Solution:
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