TimWilborne

I know. Hal starts a very nice post to thank the veterans of all wars and some guest who is probably a member but didn't have the guts to post under his name goes and tries to turn it political. Whether you are for or against any political policies you should be thankful for what our veterans have done for us.

Sorry, missed the microprocessor machine language part of your post

If your calculation for FPM then the rest is easy. This is assuming two things that you need to check on. 1. Is the FPM constant. I have a feeling that it isn't. If it was then you wouldn't need something to monitor the FPM. If the FPM is not constant, then none of this will work. Even if it only varies a little bit then the feet ran will not be accurate. An encoder would work much better in this situation assuming the second issue is not a problem. 2. Is the frequency sensor mounted to the shaft that drives the roll or to some type on external wheel that rides on the paper. If it is mounted to the shaft then this will not work. Your sensor so that it senses the paper going by and not the revolutions of the roll. Please answer 1 and 2 for me If 1 and 2 are ok the total feet will be U_LAMINATOR_FPM_TEST*U_Footage_TMR.acc/1000/60

How can you use this for a delay. Wouldn't it take a whole lot of these to bog down the processor enough to increase the scan time?

I'll second that. Without there sacrifices we would not have the freedoms or be nearly as prosperous as we are today

If you like the 5/05s web server, you should check out the 1756-Eweb. Same as the 5/05 only not nearly as limited. Think the 5/05 can only have 16 user web pages. The only limit on the eweb is 5mb. You can read and write to the controller where as I think the 5/05 you can only read. All of these new web enabled devices are great. Management can view machine statistics without any additional software.

If you have a lot of machines that are very similar but some have a few rungs added here or there, you can use the NOPs to keep your rung numbers lined up. This makes it much easier for maintainence to look through programs when troubleshooting. Beyond this and place markers, I'm not aware of too many more uses of them

Yes it is an inefficient way to program, but NOPs and AFIs are great ways to put place markers for future code and things you bypass or need to address later

Looks like you got your math down. The only things is you talk about a timer with a 1 second time base. Controllogix time base is only .001 so you need to divide your result by 1000. The maximum timer value is 2,147,483,647 so you would need to make sure that value would be sufficent. One thing I was wondering is since you have a HSC, why not put an encoder on the roll. It would make your code much simpler. Also is your measuring device mounted on a dancer or mounted to the shaft that drives the roll. Its a lot more complicated if it is shaft driven What determines the end of the roll. Is it when the paper runs out or a specific length.

Or the mention of an upcoming project that COULD lead to a large purchase

Post your code or explain yor code a little more. Mainly you ft/s calculation. Shouldn't be too hard to straighten it out

Rslogix 500 will not work with the PLC-3. It will only work with Micrologix and SLC controllers. I believe you must use 6200-PLC3 or AI-3.

You looking for information on the hardware(switches,routers,cables,etc) or communications protocols

Does anyone know how to pass the user name and password to the 1756-Eweb. Seems I remember you could add it to you bookmark somehow to login to web sites. This would just be for regular users, not administrators. They can't seem to remember their passwords.

And the guy programming the machines can't?

IT department report to someone. I thought they are the Gods of the information world. Or atleast they think they are

I don't know the answer but you might think about posting this in the general discussion forum so the none omron users will read this post. The answer should be the same no matter which Plc you use

Similar to spot welding, but you do not use the copper electrodes. You will see this done to weld two full stocks of steel. One side of the transformer is applied to one piece of steel and the other side is applied to another piece of steel. Welding is controlled by an scr. If it is a "butt" welder, you just push the steel together till its glowing red just like a spot welder. A flash welder uses a hyraulic servo valve to bring the steel together at a controlled rate. As it gets close it arcs and burns off the ends of the steel. The arcs shoot pieces of steel out so the name Flash welder. This flashing both cleans the ends of the steel and heats them up. Once they are hot, you push the molten pieces together. It may not matter because what I am wondering about is the SCR. Mainly what does it really take to fire it. One of ours has a custom made board firing board that is very hard to get. Besides this one board, the whole welding process is controlled by Controllogix

Prosoft makes an Ethernet module for the SLC. Know you can go online with the plc with it and do messaging. Dont know how much it cost

Looks like everyone here is talking about robotic welders but does anyone have experience with flash("butt") welders

I do know of programmers that admit they do this. I even know of programmers that do things as unethical as putting timers in machines to give them quirks and even shut them down after a period of time or they have to be called back in for maintainence work. I called on one company after they kicked a guy out for doing this and I could not believe the intentional flaws that had been put in the programs. But it did take them a few years to catch on and he made good money off of service calls to reset a timer

Atleast it had a nice size monitor. Ours had a 4" monitor and you could only edit one line at a time. And you could only scroll down through the program. On a long program you better better not go past the line you were trying to edit or you had to start over Seems simple now but I was very proud of myself when I managed to hook a computer though then UCNCs serial port. Of course here I am talking about it like it was ancient but I think it was built in 1982 and I think I ran it in 1995. Amazing how much things have changed. There were only a few CADCAM packages then and only the big guys could afford them. Back then I could do trig in my head, now I have a hard time adding without a calculator

See the replies in the post "How to get started in PLC programming" below this post

My first "high tech" job was running an old Union Carbide burning table. It still had an 8" disk and the punch tape. Hated not having a backspace button on the punch typewriter Has anyone ever even seen an 8" disk. I hardly remember the 5-1/4" disk.

What type of Plc are you using