Hello!
I have what I'm sure is a very simple problem for anyone with ladder logic knowledge but I'm struggling. I'll be glad to do my homework if I know where to start. Here's the system:
Inputs:
X0 - Cycle start
X1 - Cycle stop
X2 - Upper platens down
X3 - Lower platens position 1
X4 - Lower platens position 2
X5 - Timer
Outputs:
Y0 - Cycle start switch lamp
Y1 - Solenoid to move lower platens to position 2
Y2 - Solenoid to move upper platens down
Y3 - Timer start (this is an external timer)
Here is a movie of the machine: http://www.youtube.com/watch?v=wsHpkrF2Us4
Main power is supplied to the machine and the lower platens move to position 1. The cycle start switch is pressed and the platens move to position 2 then the upper platens move down. The timer starts and after the set time the upper platens move up and the lower platens move back to position 1 and the upper platens move down again. The process repeats continually until the cycle stop switch is pressed. I think this would be considered a flip flop but I'm not sure.
I'm sure this can be done in 10 rungs or less but I'm really struggling with this one, I'm not very strong in ladder logic or PLC programming... Would anyone care to point me in the right direction?
Thank you!
Jason
I have what I'm sure is a very simple problem for anyone with ladder logic knowledge but I'm struggling. I'll be glad to do my homework if I know where to start. Here's the system:
Inputs:
X0 - Cycle start
X1 - Cycle stop
X2 - Upper platens down
X3 - Lower platens position 1
X4 - Lower platens position 2
X5 - Timer
Outputs:
Y0 - Cycle start switch lamp
Y1 - Solenoid to move lower platens to position 2
Y2 - Solenoid to move upper platens down
Y3 - Timer start (this is an external timer)
Here is a movie of the machine: http://www.youtube.com/watch?v=wsHpkrF2Us4
Main power is supplied to the machine and the lower platens move to position 1. The cycle start switch is pressed and the platens move to position 2 then the upper platens move down. The timer starts and after the set time the upper platens move up and the lower platens move back to position 1 and the upper platens move down again. The process repeats continually until the cycle stop switch is pressed. I think this would be considered a flip flop but I'm not sure.
I'm sure this can be done in 10 rungs or less but I'm really struggling with this one, I'm not very strong in ladder logic or PLC programming... Would anyone care to point me in the right direction?
Thank you!
Jason