answer needed

i have a question
a two button safety device mechanism is employed in sheet metal industry to prevent operator from inadvertinently lowering the press whenhis hands are in the machine. Buttons are located at the opposite ends of the machine both buttons must be pressed for the operation to begin. When the operator begins the cycle by depressing the buttons the press must be lowered in 15 sec. if operator releases either buttons during this time the press will halt immediately. After press is down it must remain in place for 10 sec. The operator need not hold the buttons during this period.when 10 sec is expiered a green loght is illuminated showing that it is safe to raise the press.The operator may press either activation button to raise the press. Use the following input/output table
01-activation 1
02-activation2
T1- 10 seconds timer
T2- 15 seconds timer
30-lower press
31-raise press
32-green light
Write the truth table for the system following the model below.T1o and T2o are out put signals from the timer treat this as input to other elements,T1I and T2I are timer inputs, treat them as outputs from other elements (note:It is a good idea to append the table with reset signals)

Input out put Reset timer
01 02 T1o T2o T1I T2I 30 31 32 T1R T2R
0 0 0 0 0 0 0 0 0 0 0
0 0 0 1 1 0 0 0 0 0 0
0 0 1 0 0 0 0 0 1 0 0
0 0 1 1 1 0 0 0 1 0 0
0 1 0 0 0 0 0 0 0 0 0
0 1 0 1 1 0 0 0 0 0 0
0 1 1 0 0 0 0 1 1 1 0
0 1 1 1 1 0 0 1 1 1 1
1 0 0 0 0 0 0 0 0 0 0
1 0 0 1 1 0 0 0 0 0 0
1 0 1 0 0 0 0 1 1 1 0
1 0 1 1 1 0 0 1 1 1 1
1 1 0 0 0 1 1 0 0 0 0
1 1 0 1 1 0 0 0 0 0 0
1 1 1 0 0 0 0 1 1 1 0
1 1 1 1 1 0 0 1 1 1 1

The following are needed
1.Your truth table
2.Boolean logic expression for each of the out puts
3.Reduce each expression to its simplest form
4.ladder logic diagram to implement the circuitry

I can't wait for this one..... utoh

What you have posted sounds more like your teacher's question. What is <b>your</b> question?

A word of caution. If your question is "what is the answer to my teacher's question", you can expect nothing but scorn from the regulars at this site. Some might even post wildly incorrect answers. Before procedding further, you should read the "New Here???" message at the top of the page.

Please ask you teacher to define the difference between an output and an out put

Then click HERE for the answer...

-Eric

I think the part {u}I{/u] like best is:

ramakrishna said:

Buttons are located at the opposite ends of the machine

Click to expand...

Sound like the operator will need Reeeally long arms, and instead of having his hands under the press, he'll have his HEAD under the press!

Or maybe I'm reading it wrong....
Sorry if I've out put anyone.....

It is a very small press.

ramakrishna,

Shame on your instructor for not including an anti-tiedown feature in the specification for the the press control. Maybe you can get extra credit for pointing out his omission and including logic for it in your solution.