Hi to all,
I¡¦m a student who's given a lift project to do and I need help.
This project is concerned with a simple goods lift operating between two floors in a manufacturing plant. The lift is powered by a motor and can be called to or dispatched from any floor using the pushbuttons located on each floor. There are also status lights on each floor to indicate where the lift is parked.
Specifications:
- There is a call button on each floor
- A status indicator lights up if the lift is in that floor
- Inside the lift there are open and close buttons for the lift door to open and close and select the respective floors
- There are LEDs to indicate direction of movement(UP or DOWN)
- the lift user has to select the respective floor by pressing the appropriate button in the lift and the UP and DOWN contactor must be activated accordingly.
- If the lift is already in the same floor where the call button is pressed, the lift door will have to open for 10 secs then close. If the lift door has to be opened for a longer time the person has to HOLD the button manually.
- If the lift is I another floor the lift will move UP or DOWN based on the current floor. 5 secs is taken to move from one floor to another. After the lift reaches the floor from where it is called, the lift door will open for 10 secs and close.
- Once the lift is in motion, it cannot change direction till it finishes the current task and will go back to serve where the button is pressed earlier after the current task is completed.
The PLC specified is NAIS PLC FP0-14RS, which comes with 8 input ports(X0-X7) AND 6 outputs(Y0-Y5). Whereby X6 and X7 are pushbuttons.
Can anyone tell whether I have started right by putting:
Inputs:
Outside lift:
X6-UP push button(LEVEL 1)
X7-DOWN push button(LEVEL2)
Inside lift:
X1-OPEN button
X2-CLOSE button
X3-LEVEL 1 button
X4-LEVEL 2 button
Outputs:
Y1- Indictor light 1
Y2- Indictor light 2
Y3-Door open/close
Y4-LEDs up
Y5-LEDs down And also please tell me how many relays should I be having and should they consist of. Please do tell me where can I find sample ladder diagrams similar to this question to this project too.. Help will be greatly appreciated..
I¡¦m a student who's given a lift project to do and I need help.
This project is concerned with a simple goods lift operating between two floors in a manufacturing plant. The lift is powered by a motor and can be called to or dispatched from any floor using the pushbuttons located on each floor. There are also status lights on each floor to indicate where the lift is parked.
Specifications:
- There is a call button on each floor
- A status indicator lights up if the lift is in that floor
- Inside the lift there are open and close buttons for the lift door to open and close and select the respective floors
- There are LEDs to indicate direction of movement(UP or DOWN)
- the lift user has to select the respective floor by pressing the appropriate button in the lift and the UP and DOWN contactor must be activated accordingly.
- If the lift is already in the same floor where the call button is pressed, the lift door will have to open for 10 secs then close. If the lift door has to be opened for a longer time the person has to HOLD the button manually.
- If the lift is I another floor the lift will move UP or DOWN based on the current floor. 5 secs is taken to move from one floor to another. After the lift reaches the floor from where it is called, the lift door will open for 10 secs and close.
- Once the lift is in motion, it cannot change direction till it finishes the current task and will go back to serve where the button is pressed earlier after the current task is completed.
The PLC specified is NAIS PLC FP0-14RS, which comes with 8 input ports(X0-X7) AND 6 outputs(Y0-Y5). Whereby X6 and X7 are pushbuttons.
Can anyone tell whether I have started right by putting:
Inputs:
Outside lift:
X6-UP push button(LEVEL 1)
X7-DOWN push button(LEVEL2)
Inside lift:
X1-OPEN button
X2-CLOSE button
X3-LEVEL 1 button
X4-LEVEL 2 button
Outputs:
Y1- Indictor light 1
Y2- Indictor light 2
Y3-Door open/close
Y4-LEDs up
Y5-LEDs down And also please tell me how many relays should I be having and should they consist of. Please do tell me where can I find sample ladder diagrams similar to this question to this project too.. Help will be greatly appreciated..