mr_electrician

My only issue now with fully understanding this function is when I compare for example VB4 the real time value is 87 and climbing. The time in the plc is 57 minutes. What am I missing? Same with the seconds. The hour seem to read properly.

I have figured out how to use the READ_RTC by referring to your download of automatic daylight savings adjustment.

You can set the real time clock by selecting PLC in the menu bar at the top, and then selecting Time Of Day Clock. I choose Read PC clock selection.

Thats what I would like to do. I am not to familiar with the read RTC instruction and it does not give a very good example on how to use it. I just want to be able to go online and look in the PLC in a storage area, and log no more than 20 occurances. These are my own errors I made with M bits.

Thank you for your help.

Hello, I am looking for some clairification on the proper wiring for my MicroLogix1200. I will be using 24Vdc. I have a 1762-L40BXB. I am being thrown off by the terminals because it shows both 24vdc and VAC with DC 0 written below it. Can someone give clarification as well as what I should fuse the processor at. I have attached the terminal layout.

Excellent, thats what I figured but wanted to be sure. Thank you

Hi, I am wiring a new MicroLogix1200 PLC (1762-L40BXB). This is a new processor for me as I am use to SIEMENS. Can someone tell me what terminal number the following addresses go on. I:0.1/0 I:0.1/1 I:0.1/2 I:0.1/3 I am pretty sure I have the other addresses I am using figured out.

Thank you, that makes sense now!

Hello, I am using a Micro Logix 1200 40 I/O and 1 16 point input card and 1 16 point output relay card. My question is......how do you set up the input and output tables so that it reads I:0.1 to I:0.16 then go to I:1.0 to I:1.16. My addressing goes all the way to I:0.63 before it goes to I:2.0

Thank you

How do I know if I have a series A, B, or C for my micrologix 1200 part number 1762-L40BXB. When I go to create a new project with RSLogix 500 it gives me 3 choices.

Thanks, I was hoping I could tell before the unit came so I can start my program (which by the way I will need help on!) Is it possible to change the series later if you select the wrong one?

Hello, I am trying to connect to our Allen Bradley PLC but am unfamiliar with AB PLC. I am use to SIEMENS. I am trying to connect to a 1747-L542C CPU. I am going to use the 232 port. WHat would be the pin out for this and what do I need to do in the RS Linx so I can get online?

Hello, I have been trying to get a part of my program to function the way I need it to for 2 1/2 weeks with no success. I know it is something simple that I am not seeing. What I am trying to do is divert 1 part to one machine for every 2 parts that go past the diverter to another machine. The parts travel along a conveyor system. The problem that I am having is when I am diverting the 1 part the next part of the program that lets 2 parts go is starting. I think the problem is in my section that releases one part. WHat I think is happening is it is not getting the done signal fast enough and is repeating it self. I will attach the program in a zip file format. I have been using micro win for programming it. I am sure there will be questions. The section that you need to look at is "L10 L5 Distribution" as well as "Program Block" 1020_23_conveyance_rev.4.3.zip

I get what your saying. I am employing subroutines in my program. I use one for when both lathes are in service, as well as a subroutine for each lathe when it is running solo.(Well that is the final plan!) Anyways I did get it finally working. Now I can take my logic and clean it up. Right now the program works, but is pretty sloppy looking! Anyone have good suggestions for cleaning up my program?

Thank you Crossbow for taking the time to look at my post. I am pretty new when it comes to creating programs. I did in the meantime get my main issue of 2 parts going to early. It was in the divertion to L10 which should only receive 1 part. Because of the travel of the part the logic was becoming true again for that rung and re staging the part. I am attaching the revised program so you can see how I got around that issue. As well I am doing a 1:1 ratio because the L10 machine was always waiting for parts. The only issue I have left is when the L5 magazine is full but the L10 infeed conveyor is not, my parts are not released from the stager to go into the L10. The only thing that happens is my gate extends.(which is one of the things I need to happen. I do not have any issues when the L10 infeed conveyor is full. The main stager will release parts the L5 magazine as needed untill full or untill the L10 needs parts again. Again, probably a simple fix that I am not seeing.

Hello again, this logic is frustrating to me for 2 reasons: 1 the company needs it done ASAP.....2 my skills and experience don't go far beyond basic programming. Can someone have a look at my logic that I have so far under the subroutine part allocation. I need to know how to release a set number of parts based on certain conditions. As well I need to extend a gate and push the 6 parts that were released when they are required for L10. L10 is a lathe by the way. 1020_23_rev.1_April_12_2K8.zip

Hello, can someone show me the easiest way to direct parts on a conveyor system that feeds two seperate lathes. What I have is a stager that releases parts when needed onto a spine conveyor and a diverter that directs the parts to the lathe that needs parts. I want to send 6 parts to one lathe when needed and 10 parts to another lathe when needed giving priority to the lathe needing 10 parts. I am using an S7-200 PLC. Thanks guys.

I am using whats called Ladder III. It is used for Fanuc CNC controllers to program the plc part of it. What you attached is different than what Ladder displays but I think that the idea would be the same on the identity of whats used as a bit or a word. Thanks for your help.

Hello, can anyone tell me how to read the address map section. To be more specific, I know that if an R bit is used it will show a dash ( - ). But what does it mean when it shows a * ? Also how do you know what is being used as a word or double word?

I am using a 300. What you show is almost the same as what I wrote. I am going to employ the positive rise bit. Net:1 M40.1(nc running)M42.5(strip blocks missing)M42.6 (Stripper key removed) ------[ ]--------------[P]------------------------------(S) Net:2 M80.2 - break is active(bit is 1 till end of cycle) M42.6 -----[ ]------------------------------------------------® You would probably have to see the whole sequence of events or understand the machine to see this work but I am confident it will. I just have to battle proof it. Too bad there using the machine now! Thanks guys.

I am trying to write some logic that will enable me to set a bit(using the set/reset bit) only once untill a certain condition happens. WHat I have is a flow form machine that has some logic that will allow the machine to break the program after the part is formed. I want to add to this logic but I need to pulse the bit one time. Is there not any kind of one shot in Siemens?

Hello, not sure if this is a good place to post this but since I am using a LOGO I though why not! I have a minor issue when I plug my new control box intpo one of our lathes. My control box is for a lifting station that lifts raw parts to a specific height so the robot can grap it and transfer it. I am using a Logo to control the lifting logic. I am using 24vdc from the lathe as well as a couple signals fron various relays. What happens is when I connect the harding conector to the lathe it kicks out the lathe and gives a cpu fault. Only when I turn the lathe off, plug in my connector, then turn it back on is it ok. As well I can disconnect with the power on with no issues. Correct me if I am wrong but could it be that the lathe is getting some kind of surge from the logo power up when I plug this in. Would I need some kind of surge suppresion like a MOV to correct this, and if so, what size for a 24vdc/3A load. Also, would I copnnect this across the 24vdc? Thanks to all who respond!

I figured it out and as I was going to post my fix, you verified what I discovered. Thanks for your help!!