Can u help me on a RSLogix 5000 program?

[agariza]

I am completely stuck on building a ladder program that requires a start button to be pressed 3 times to turn on motor 1. Then motor 2 starts when the same button is pushed 2 more times. Pushing the button one more time turns both motors off and resets everything. The program I build does not work n I have no idea why not.

 

[geniusintraining]

Im on my phone so cant post a program but...

Push button = counter value, counter value = to motor starters to run/start/stop

 

[agariza]

for some reason that i cannot see its not working for me. Can you give me a cpl lines of logic so I can see what I'm doing wrong. Ive got pb going to a counter but the counter isn't counting

 

[bernie_carlton]

Is the PLC in run mode? Post your current program, point out how you expected the code to work and how it isn't. We'll help you.

 

[agariza]

Counter will not count when I toggle start, been stuck for hrs

 

[agariza]

Is the PLC in run mode? Post your current program, point out how you expected the code to work and how it isn't. We'll help you.

i just posted pic but not sure I replied directly to you. First day on this forum

 

[agariza]

Counter doesn’t count when I toggle start button! That’s my issue

 

[agariza]

When start button is pushed 3 times, conveyer 1 will start. Conveyer 2 will start when the same button is pushed 2 more times. Pushing the button one more time will turn both conveyers off and reset everything

 

[agariza]

Here’s what I got

 

[drbitboy]

Don't worry about counting yet.

Do you see the CU output bit of the CONT1 object turn green on that first CTU instruction when the three XIC instructions' operands' values, ESTOP and START BUTTON 3 and SELECTOR 2 ON, are all 1?

If not, solve that problem first.

 

[Steve Bailey]

Is there a rung that resets the counter somewhere? If the reset logic is true, the CTU will not increment.

 

[Operaghost]

The CONVEYORS routine is a subroutine. Verify the MainRoutine has a JSR that is calling the CONVEYORS subroutine.

OG

 

[agariza]

Is there a rung that resets the counter somewhere? If the reset logic is true, the CTU will not increment.

I got it figured out, thnx for replying

 

[agariza]

I am completely stuck on building a ladder program that requires a start button to be pressed 3 times to turn on motor 1. Then motor 2 starts when the same button is pushed 2 more times. Pushing the button one more time turns both motors off and resets everything. The program I build does not work n I have no idea why not.

I got it figured out, thanks for replying

 

[drbitboy]

for some reason that i cannot see its not working for me. Can you give me a cpl lines of logic so I can see what I'm doing wrong. Ive got pb going to a counter but the counter isn't counting

You are at a crossroads between being a beginner programmer and being a competent programmer.

Beginner programmers think like this: "I know I told it do do A, but it is doing B, so I think something is broken in the PLC because it won't do what I told it to do."

Competent programmers think like this: "I thought I told it to do A, but it is doing B, so I know I actually told it to do B, because the PLC cares not a whit what I want it to do, but it will mercilessly and inexorably do exactly what I tell it to do."

It's a subtle difference, but it makes a huge difference in how you diagnose the problem.

This is what I would do: