mr_electrician

hello, can someone tell me what the pin out is for a communication cable that will connect from my laptop to the plc using a 232 cable. Thanks

Thanks, I do have an adaptor card and hardware adaptor for CP5512. My problem now is everyime I try to connect, I get a message that the port is being used by something else. I can not figure this out. I have the communications set on 5512MPI. Any ideas?

Can anyone tell me what an AEG PLC uses for software? Thanks

Thank you for the quick responce. We received what I call a boat anchor yesterday that employs an AEG PLC. Looks like it was built in 1996. Looks like I will have to learn another new PLC.

Hi, just curious if anyone has used Fanucs new PLC III software. Apparently you can use it on CNC machines to access the PMC.

I have attached a manual for Step 5 V7.2 Hope this helps.

Hello guys, I am having a brain fart trying to manipulate a machine. We have a KIA lathe that uses a Fanuc NC, and also has an LG PLC that was used for the work stalker.(parts loader) We have taken the stocker off and replaced it with infeed and exit conveyors, The way that it worked was certain M codes were initiated in the lathe based on the status of output signals from the LG PLC. I basically have 4 M Codes whice are 140 (Unload ok), 141 (Unload End), 142 (Load OK), 143 (Load End). I am having my problem at the condition of start up. When the chuck in the lathe is unclamped, it will start a timer I use to verify that a part has been released.(Basically my unclamp signal starts the timer) I need to somhow trick the machine at start up to not look at this condition using the LG PLC. The trick is that I only have a few options since we have no way of programming the FANUC, and that the machine builder has only used certain inputs to the PLC from the FANUC. Sound confusing, it's frustrating. Hopefully one of you guys will want the challenge. I can give you more detail if needed. Thanks guys

Yes I totally agree, and why someone may ask? Well because that is what I have done. I used the LG as my plc, and the available inputs from the NC. After a crash course in LG PLC programming, and firing the rits bits off at the right time, I was able to get it to work. Actually impressed with the LG being the softwar is a free download of the net! (GWIN)

MCR feature, hello people, can you tell me if I am using the mcr instruction properly. This is one of my final labs for my course. The way I understand it is that logic between the MCR's are only excecuted if the MCR's are true. Thanks guys.

My bad, it is actually a Fanuc NC.

Can anyone toll me what the following function is and what it is used for. I have a line in my program that calls a sub routine that says sub9, and under that it has COM WHat is this for? Looks something like this: ------------------------------ | SUB9 | 0000 | COM | -------------------------------

Hey guys, I am wondering if anyone has experience with wiring conveyors. This may sound simple but there is a catch to it! The conveyors at work are in sections to form a long spine conveyor. Right now the conveyors are wired using emt runs straped to the drip pan located under the belts. I want to re due this for 2 reasons. Reason 1 is probably the most important reason, we are starting to have belts/chains on the conveyor that are ready to self destruct. We need to be able to remove the conveyor out of place. This of course will involve pulling wire from out of the conduit and removing conduit runs. This will also create downtime! Reason 2 is because I am going to remove the programmable relay set up, and install a plc.(If they finally break down and see that this is the way to go now!) So for those automation designers, what would you do to wire up such a conveyor system that has 600V motors at .9A, and a bunch of 24VDC controls? (mostly photo eyes)

I recommend the SEE Technical software. It is $200 buck and what you can do with it is great. We use it for all our electrical wiring diagrams, but you can also do hydralic and phnuematic diagrams with it. It has a librairy of all the current schematics that are used. Also you can save it as a CAD drawing and open it on autocad. Try the following link, http://www.ige-xao.com/see-technical/index.htm If it does npot take you to the site, the google see technical and it will bring up the website. Let me know what you think!

Yes it can be done, we have done it here where I work with all of our touch screens. Have not had any issues.

Hello gentlemen, I am working on a project that is frustrating me. I am trying to create a program that will test transmitters with using air pressure. I have the first steps down but I am stuck at the testing stage. I need 5 stages of testing with 3 sec. intervals in between. My good transmitter will read 400, 800, 1200, 1600, and 2000 with a tolerance of + or - 4. I figure if I can get the first one the other 4 stages will be easy, but being the rookie I am, I have to swallow my pride and ask for your great expertise. This is a lab assignment so all I am looking for is a push in the right direction and if I the logic I have allready is a good start. See the attachment for what is done allready. Also I need to have a fault bit for every stage that fails. These will be reset at the end of the cycle by the operator. I will use the stop button for that.

Exactly the same situation I was thinking about!!!

Hello, I have a question here, well most of us do when we post I guess Can someone show me an example of some logic using the LIM (limit instruction) I am having troubles fully understanding it without seeing it being used . Thanks guys.

Yes that is true, I just was looking for a sample of this instrution being used in some logic. I am taking a course and I have to implement this function into my logic.

Hey, thanks for the examples, helps me better understand how they are used in the logic.

Allrighty everyone, here is my next question coming from me, the learning programmer. My supervisor has just asked me to program into existing logic on all our flow form machines. We are using Step 7 for the PLC, and I think Win CC for the touch screens. What I have been asked to do is program some logic that will allow an operator to key in a set amount of parts. Then once the machine starts, it counts each part that is made in the machine. When the machine count reaches the set point entered from the operator, then the machine will stop. I have an idea of what to use as for incrimenting my counter (either count up or count down), but I have not had much exposure to touch screen programming as of yet. How do I program a soft key onto our touch screen. I am guessing that I am going top have to start using some shift functions, which in turn will move me from basic programmer to intermediate. I love these challenges! Bring them on!!!

Hello, has anyone ever maxed out there outputs that are available on a 24Rc0 SIEMENS LOGO. I maxed out today at 16. Only 16! That sucks!!!!

Hello guys, as you know from my previous post, I have maxed out my LOGO outputs. The company does not want to buy a small plc yet, but I need to add 4 new conveyors to the system. My thought is as follows. Our machines feed finished parts onto a main spine conveyor. I was thinking that an easy solution would be to group 3 or 4 contactors which are 24vdc (each spine cponveyor currently is asigned to it's own output), and have 1 output turn on those 3 or 4 contactors. I would be well in range of the current rating of the relay output. Each contactor draws 197mA, the rating of the LOGO output relay is 10A. Does this sound like a good fix for now, or is there any other ideas or examples out there? Let me know what yopu would do.

Whats so magic about 1.732???? It is the square root of 3 and is used for 3 phase calculations. Not all electricians graduated in the bottom half. I myself was near the top and can do alot more than just bend pipe and pull wire.

As my electrical inspector always said, 50% of electricians graduated in the bottom half. Why an electrician that is licensed think that 3 phase means multiplying the 3 readings is scary. Did you carry a sign like this ---->

Good day everyone. I have a question that I would like to have answered. Can anyone tell me the differences between all the ways to communicate, and what advantages/disavantages there are between them all. I have heard of device net, AS i, profi bus, 232 com, ethernet, and so on. I just want to have a good understanding of why you would use one over the other? Thanks to those who reply.