PLCMentor.com
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Ok this is what I understand. With the ethernet driver you have programmed station 0 to 130.130.130.2 which should get you a connection to your enbt with your NIC configured as you mentioned. Did you try the ping that was mentioned? if you receive a timeout then you have other network issues. how are you connecting from your PC to the enbt? Are you connecting vai a switch or directly cabled. If you are directly cabled, you will need a ethernet crossover cable. Once again, the ping will let you know if you have a good connection. If ping comes back ok, then maybe you should try the ethernet I/P driver since you are communicating with an enbt. finally, make sure your driver is running in the rslinx configuration window. probably not an issue with an ethernet driver, but worth checking. finally, did I mention ping?? Russell -
First, the key switch postion REM/RUN will have no affect on your RSLinx. REM allows you to remotly take the PLC from program to run, etc. from the RSLogix programming software. RUN disables this capability. I would leave the processor in REM position unless you have poor controls on who has access to your RSLogix programming software. You mention your ethernet driver is configured properly. Can you access the PLC through this configuration with RSLogix? Does your node show up in the browse window? Did you add the ethernet I/P address to the list in the configuration area? Russell -
Looking at your spreadsheet, it seems that you are logging on a regular interval to the excel sheet - not just when an event occurs. If you were just logging the actual events, then you could just add a column that would determine the time difference between each consecutive record. That would give you up time and down time as I understand your sheet. Alternatively, I think there is a way to create a separate sheet in your workbook that eliminates all the 0 records after which you could achieve the same thing. Do I understand your log properly? Can you create an alternate trigger that would just save the down and up events? Russell -
Ditto -
The 5000 is tag based so there is no data table like you are used to. You can however create integer, float, and other types of tags as required. You can also create user defined data types to help organize your data better. Also, notice that there is an edit tab and a monitor tab when you open your tag list. You need to be in the monitor tab to be able to view the values of your data. finally, the 5000 stuff are 32 bit processors so you want to use double integers. Otherwise all your calculations will have to go through a background convert from 16bit to 32bit integers and back again before and after the calculation. I had to write this quick so hopefully it is understandable. let me know if you have further questions. Russell -
Conor, I too am impressed with Factory SQL. In fact I just posted earlier today that we have added training videos on our PLCMentor training site. I also like the Wonderware product. In addition to the historian, they have a companion product that makes all the reports and other data sifting stuff easier. There is something to be said for easier integration between two packages made by the same company also (ie, intouch and historian). Russell -
Hi everyone! We recently added videos on configuring Inductive Automation's Factory SQL and Factory PMI. If you are not familiar with the IA guys, you should check out their different take on SCADA. Their system is JAVA based and uses a SQL database (SQL Server, MYSQL, etc.) as the base. Their big advantage in my eyes is that their server based system can drop clients all over the place with no client app fees. For someone who really only paid attention to the big players in the SCADA arena, I was pleasantly surprised by their system. Russell -
The heading says ML1400. So what is all the discussion about working around serial commnuications? Should be able to communicate Ethernet I/P to the other ML's via a wireless ethernet device. Am I missing something? We have had success with MOXA equipment. You might want to look into moving up to a small compact logix and use an ethernet i/p gateway with wireless I/O. Banner has some pretty good offerings that are fairly cost effective. I am a pretty recent convert to this as we had a bad experience about 5 years ago. I guess technology has moved forward. -
That is part of my quandry. I want the videos on youtube. That is where I got my start on this video thing. I do want to protect the original content on our site. I do not want sites poaching our material. At this point, that material is our product. I am sure there would be some future benefit from project work generated, but that is not really my purpose for the site. Ron, great search results! I have been having limited success in the class we discused just not our magic number. thanks all for the info. Russell -
We are pleased to announce that we now have added support for Wonderware Intouch configuration. We added our first video yesterday and we plan to add many more! We are still adding new videos in other areas and have our first training courses in the final stages of development. We are in discussions with several manufacturers to be able to add their videos to our site. Thanks for the support we have received from many of you here at the MrPLC forum! Russell -
Ron, I think you leave yourself open when you allow your videos on youtube to be embeddable (ie, anyone can add your video to their website). There are sites all over the web that grab vidoeos from youtube and do nothing more than embed them on their sites. You may want to lock them down if that is a concern. Hey but let me know if you do that! If possible I would still like to be able to use them on our site. I think from our previous discussions you are ok with that. I would be interested in what discussions you have had with your lawyer. They have put two of our videos on their site from youtube that we left protected (ie, not embedable). The only thing I can figure is that they must have recorded them as they were viewed. I wasn't too worried about it since when you watch the video Automation Technologies is part of the video. I now am concerned that since I locked those videos down that I open myself to diluting the copyright. Hmmm. Russell -
Keep the oneshot in mind whenever you do a math instruction that involves one of the operands as the result (ie, x+1=x; x-1=x, etc). Russell -
Ok, your probem with going to 32767 is as previously mentioned. You need a oneshot in rung 9. This will cause it to only add n7:20 to the preset once on the logic before the oneshot going true. Right now the rung will add N7:20 to the preset each scan that the tt bit is true and the GRT instruction evaluates true. If you add a OSR after the GRT you will make a good first start. I dont think I completely understand what you are trying to do with your logic. I'll have another look, but the OSR is big. Russell -
Let me know if you need further assistance. We are in the Charlotte area which I think is about 4 hours away. One of our guys used to be a applications engineer for a GE rep so I am sure he can help. We have videos on the Proficy stuff also on our training site (PLCMentor.com) that might help also. Russell -
I've always wanted to take my security system contacts into a PLC. The junk that the security company installed (free! - right) puts about 5 contacts in series and takes them to zones. Some day... I would like to take those directly into a PLC (battery backed) and echo them back to the security system. Then I could know exactly which contact was tripped or just causing problems. I do wish the home control systems would add opc interfaces to allow connections with PLCs. Russell -
In addition I would want to know how you are intending to control the VFD. You mention a 1500. With that platform I would assume that one would control the VFD via analog outputs and discrete ins/outs. Your post seems to indicate wanting to use some type of communication method. If so what do you intend? -
I'm sorry Ron, but my daughter wont let me listen to anything other than Hannah Montana and the Jonas Brothers... The closest thing we get to culture in our house is a colorfully animated cartoon (I must say the new Monsters vs. Aliens movie is pretty good). Ah such is my life. Russell -
Of course Russell you big dummy you cant use the freebie software with that... -
Tim, Most of our AB stuff is geared towards the SLC500 platform as that is where we started; however, the instruction set is similar to the Micrologix so I would recommend looking over our videos (PLCMentor.com). In a month or so we plan on offering a coursework - both self paced and what I would call semi-instructor led. It will be heavy on 'labs' which is the most important part of any PLC coursework. The first course set will be on the SLC; however, we will charge so it may not be an option. I would offer a suggestion on the Micrologix. The 1000 is cheap, but offers no online programming capabilities. I think any training program would want to cover that topic. The 1100 offers online programming, analog I/O and an ethernet I/P port. Another alternative is to keep an eye on EBay. SLC's come up on there regularly though getting analog on the cheap can be difficult. Russell -
Thanks for you kind comments! I am continually amazed at how many people have shown interest in automation. I am glad you are finding our content useful. Russell -
Sure the Ethernet I/P port on the micrologix would handle that. You would need some time of I/O driver on the logging side and software to log the data. Any of the SCADA systems out there could handle this (RSView or Factory Talk, Wonderware, etc.) Inductive automation has a module that just handles grabbing the data from an I/O driver and placing it in a SQL database. Maybe let us know a little more what you have in mind and budgetary info. Russell -
I think I have used single letters and aligned them one under each other and then grouped them to make them easier to deal with. Kindof a pain. Russell -
I would have to ask why you are using indirect addressing with so few indexes. It seems plugging in 10 rungs would not be all that cubersome and would eliminate pain and suffereing now and in the future. I look at index addressing as something that should be used rarely. My number 2 concern in programming is how easy is it going to be for my client to follow what I have done (number 1 being that it works correctly). If you had something that really needed to churn through some registers or possibly you have some complex logic on the ouput side of the rungs you have shown us, then it makes sense. Also I would be even more wary programming with indirects on a processor that doesnt allow online programming changes. If the logic does get hairy (technical term) and you have to troubleshoot a problem, you will want the flexibility to be able to add a little code to see what is going on. Russell -
Yeah Dan - problem is that none of the devices listed here have hermetically sealed contacts. I guess even if they did they may opt for not going for the certification. Did a quick search and couldnt find one. So maybe we are both right...Its possible just not available. Russell
RSLinx Pro and RSView32
in Allen Bradley / Rockwell Automation
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