part2

Thanks woody...

Here is the omron program for the ladder(part1):

0 LD 0000 (notice it start @ 0)
1 OR 1000 (R1 is relay NO cont)
2 OR 0001
3 AND NOT 0002
4 AND NOT 0003
5 OUT 1000
6 LD 1001
7 AND 0004
8 TIM 00
#__ (# in sec)
9 LD 0005
10 AND TIM 00
11 OR 1001
12 AND NOT 0006
13 OUT 1001
14 LD 1000
15 OUT 0100
16 LD 0101
17 OUT 0101
END

I'm not 100% sure about the program espcially the circuit line#3 where #11 & #12 can be placed ahead of #10. I need to restudy but have no one to teach me. The manual buttons are not included because it is in auto mode. Another thing is when the LS2 is reached and the stop button is accidentally pressed, the selector has to be put to manual and the manual retract button has to be pressed until LS2 is not hit.

I need to think also how to place the reset button if necessary. Corrections are appreciated because it's been a while(10years) since I did this. I can't remember how to wire this too but I can remember that L1 is on input side and just connecting all the switches directly to inputs.

Later...

Why not display a screen shot of the ladder like I did? I used mwsnap3. I believe AKKAMAAN has mentioned this before. It will allow you to capture just the window of interest which is what I did above.

Maglub, you have got to use symbols otherwise the next person that must use the program to trouble should will be swearing at you. It isn't a big deal in a program this small but when you do this for a real press the program will be MUCH bigger. You can never have too many comments either.

The clown union is going to kick you out because you are starting to get serious.

Lol, this is just a sample for moving the cylinder like a milling table maybe. Somehow I just saw woody's post this morning. I don't have any standard plc symbols too that is used in higher programming application. My illustration is just basic and as I said my PC knowledge is limited.

For electrical symbol:

push button start/stop is very common
LS1= limit switch at fully retracted position and I held by the cam
LS2= limit switch at fully extended position
T= timer in output; T in input is the timer NO contact
R1 at output is the relay for extend(coil)
R1 at input are relay contacts for extend
R2 at output is the retract relay(coil)
R2 at input are contacts of relay
S1 is solenoid coil for extend
S2 is solenoid for retract

Peter, can you simulate this without any wires/switches or plc attached in your PC? In your programming(higher) are there any assigned letter/word description to replace the addresses?

Btw I could revise the circuit with a reset button at auto by adding another push button and another limit switch(NC) at same position as LS1.

My drawing is big that's why I can't put everything(including symbols and program in one paper.

Later...

Have a look at this free download and the sites tutorial.

http://www.tri-plc.com/trilogi.htm

download link
http://www.tri-plc.com/iTrilogi6Edu/
password:= LadderBasic2009

http://www.tri-plc.com/TLeval/...laddertutorial1a.htm

Maglub ..I've emailed you a quick tutorial to show how I posted your pdf's as pics.

Cheers Woody

This message has been edited. Last edited by: Woodygb,

Reset button in series with anothe LS at fully retract is connected to relay R2.

Thanks woody...
I have some ships crane and steering gear hydraulic circuits too...although old ones but as far as I can remember one is hugglunds with a half displacement motor.

quote:

Originally posted by maglub:
Peter, can you simulate this without any wires/switches or plc attached in your PC?

Yes, but this is not a PC. It is a motion controller. The better motion controllers have PLC type functions.
The motion controller is multi tasking. I can write a task that simulates the machinery and then the main task that controls the machinery. This task forces the inputs to be on or off as if the real machinery was doing it. Each axis has a built in actuator simulator that can simulate the response of a hydraulic actuator given the gain, damping factor and natural frequency. Most people think writing a simulation task is nuts because you end up having to write two programs but in the long run it saves time especially if you don't have access to the machinery. The flying shear thread I just posted is all done using simulators. There are a few here that know a am very big on simulators.

I have been on two many startups where customers are writing code in the field. That is simply wrong. It cost them bundle too paying for my time. The right way is to be as close to done as possible. The motion controller can then be used to help the hydraulic/electrical guys diagnose problems.

Often during startups you don't have access to the machinery because someone else is working on it. If you have a simulator you can switch to simulate mode and keep on working.

quote:

In your programming(higher) are there any assigned letter/word description to replace the addresses?

Our controller can use tags, symbols or names. It is possible to use the IEC address such as %I0.0,%Q0.0 or %MD0 using IEC addressing but it is much better to use tags or symbols because then you can change the I/O around without having to do a search and replace for each address in your program.

Note, our controller is designed to look like a Modicon PLC to another Modicon PLC, the same goes for AB, Koyo, S7, Omron or Mitsubishi. The addresses change depending on the PLC you are currently using but if you use symbols then the program in the motion controller doesn't need to change. This is very good for system integrators that must use different brands of PLC because each of their customers uses different brands.