OPC UA client

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• Is there a maximum number of clients to one opc Server opc

  I created a server using this tutorial:

  http://digital.NI.com/public.nsf/allkb/CC9CDD577F041786862572120061EB5A

  I am noto using NI OPC Server (I think) and I'm using DSC noto (obviously)

  Is there a maximum number of customers mutual funds for an opc server created in this way?

  I have LabVIEW 2009 now but the main code was written in LabVIEW 8.6.

  Thank you

  OLA.

  Neste caso, a limitacao para a Criação customers also estara watch a ability of sua rede e MATERIAL, or seja, na o maximo para um indefinido e OPC Server clients number theory.

  E claro what puder use OPC server o senhor NOR e o DSC module, a confibilidade e estabilidade of sua aumentarao, POI software esses size adicionam tools ao LabVIEW as facilitam a programcao of codes para este projeto tipo.

  Atenciosamente.

  Hello

  In this case, the maximum number of clients t connect to an OPC server is limited by the configuration of the network and equipment, in other words, in theory, this maximum number is undefined.

  It is also true that if you can use the OPC server of NOR and the DSC Module, your application reliability and stability increases, because this two software add tools in LabVIEW that facilitate deploying code for this kind of project.

  Sincerely.

• cRIO communication as a PLC with NOR-OPC-Server

  Hello

  I have the task to implement communication between multiple cRIO and NOR-OPC-server. The OPC OR server should act as a data manager for a complex interface.

  I tried the NO-OPC Server and I managed to communicate with the server OPC-NOR as OPC-Client in Windows using a server IO and shared Variables. But the task is to do it on a cRIO. I tried to open a data from a cRIO socket connection to the NOR-OPC-server using a specific URL by using "DataSocket select URL.vi." But as long I do not activate the simulation in the OPC Server - OR-I get errors on the data socket connection opening. If I activate the simulation, which is not the solution, I can write data without error, but the quick OR-OPC-Server Client sees no change for the data label.

  I have the feeling that I am not a good way to get this working. Is there anyone with experience with this? Is data taken one possible at all? It is possible at all? I have to put in place a cRIO-OPC-driver?

  Thank you.

  Hello

  I found the solution in this article:

  http://www.NI.com/white-paper/7451/de#H36

  Thx for your help.

• 2011 OPC Server V5.5 in Lookout 6.6

  Hello

  I use Lookout 6.6 with the OPC 2011 V5.5 server.

  The OR - the server is accessible via Lookout and the integrated OPC Quick Client. But if I use another Client such as the OPC data-spy or PROFILAB,

  the server is not accessible, the name of the server appears in the list, but is not accessible. Other OPC servers installed on my PC are accessible by each customer. Do I need to have a special license for the OPC Server OR provided with the software of Lookout 6.6? I am using Windows 7 32-bit edition.

  Thank you for all the advice

  Greetings

  Claude

  Mike's right. We don't allow connection to the OPC Server OR the other OPC clients.

• OPC servers OR with the hardware OR

  Hi all

  We want to use the latest version of NI OPC (v. 4.27403.1 - U) servers for the collection of data from different sources (cDAQ, WSN) hardware. Has anyone have experience, how does it work? Material is NOT mentioned in the list of drivers NI OPC servers!

  Thanks for your support!

  Frank

  Frank,

  You can set up a virtual DAQmx Global channel for each data source unique cDAQ, and you can use LabVIEW to write an application that runs on the WSN gateway programmable to publish the data received in the variables shared on the network. These two sources of data can be imported into the OPC server from OR.

  To read the DAQmx virtual channels, create a new channel of NOR-OPC data, configure it to use the driver 'OPC DA Client' and select the 'Engine.1 of Instruments.Variable national"on the local computer as OPC server.

  Then add a new device for each of your channels DAQmx (leaving the largest part of the default options clickable at the moment) and when he was asked to select items to import, find and select the global virtual channel DAQmx in the category "National Instruments.Variable Engine.1\System\DAQmx\" and click on "Add >".
  .

  Best regards
  Sebastian

  PS: the new version of NI OPC's NI OPC servers 2010, code internally V4.500.462.0 :-)

• Communication PLC

  Hi all

  I have established a link between Siemens PLC with an OPC server. The values of the tags in OPC quick client also are up-to-date.

  But allow to update the values of the tags in VI that is created in a project. The deployment of the tags are also successfully done.

  Please help me with my problem or tell me where I'm wrong.

  Thank you best regards &,.

  Manisha

  
  

• Seting place labview as a remote OPC client

  I'm having trouble extraordinary setting LabVIEW as an OPC client on a remote computer.  I followed the guide of the OPC foundation on Windows (http://www.opcfoundation.org/DownloadFile.aspx?RI=326) dcom configuration.

  On a single machine seems to have had some success.  Kepware quickclient using, I can connect and view the values for all of the tags on the server.  When I use the DSC module to set up a mutual FUND I can show tags, but it does not connect to the server ("Connected?" State of customer variable set to false).  I can't see the value of the flags.

  On another machine I place, I can't reproduce the pooling at all.

  I'm using LabVIEW 8.6.

  Thanks for any help I can get.

  
  

• Communication of Labview (OPC client) to the citect (OPC Server)

  Dear members,

  I want to access the data (from the Labview 8.6) which is on a PC of citect.  As I am not aware of citect, can someone explain me how to do this, if you had experience?

  Using the mechanism of data taking, I think we can run, but what kind of arrangements are to be made on the side of citect. Is it likely that an OPC server to perform citect side, so Labview can act as an OPC client? How can I implement this? I went through examples OR Client.vi, Browse to Item.vi OPC OPC Demo.

  Someone with a 'Labview' experience - Citect here?

  some ideas please.

  Thanking you.

  
  

• NIDAQ no visible channels by the opc client

  I have a 9188 NiDAQ connected to a PC via ethernet. All modules are visible in MAX and check out OK but if I try to connect using OPC, I don't see an item "ServerPollingRate". Is there something I need to do to get the NI OPC server for publication channels?

  It's my first time with the 9188, I used the expansion chassis compact fieldpoint several times before without any problem.

  Hey,.

  You run an OPC Server OR on the PC? What you're reading with / publish on?

  It would be useful to have a system diagram or description, and what you've done so far in what concerns the implementation.

  Here's a pretty good overview of the OPC with DAQmx configuration, it might have the answers you are looking for.

  http://www.NI.com/white-paper/3742/en

• Channel missing features like tags of the OPC

  Hello

  I have a number of features of channel in my system. First of all, I added these features for track and ran with it for a while. Now, I added the same characteristics for the rest of my strings of the accelerometer, but they fail to appear in the form of tags when I navigate on the server from a client. The first channel, they are all there. The characteristics was the installation for the first string until I allowed mutual FUND on the InsightCM server. I Don t know if it has a meaning or not.

  Thank you.

  Hey Jens,

  It seems that whenever a InsightCM tag value updates our code OPC Server checks to see if there are new tags InsightCM he needs to create corresponding OPC tags for. So if you configure features and a new channel, but has not to collect new data still in InsightCM the OPC server will appear any OPC tag.

  The OPCHistorian.TagCreate trace point creates a log entry when new tags are created.

• Communication of lookout with CompactLogix 5370 series using OPC will not work

  I am trying to contact a series of 5370 CompactLogix 1769 - L18ER - BB1B PLC. I tried NI OPC servers V4.5 and NI OPC servers V5.5 2011 with no luck. I can create a new channel and device ok using CompactLogix 5300. I can automatically create the database of the tag and it will pull all the tags of the PLC ok. I use Lookout version 6.6. When I create a new driver using OPC Client it will show all the tags correctly.

  As soon as I drag a label on a Panel, Lookout alarms with:

  

  OR mutual FUND shows these errors:

  

  Any help would be greatly appreciated!

  I had updated the firmware in the CompactLogix at 24 Rev before you start.  Mutual FUND would work for about 25 seconds before stopping, but only after downloading a program in the PLC.  I got the firmware to the oldest I could 20.014 and now everything works as it should. OR mutual FUND is not yet compatible with rev 24?

• Can not find driver for CompactLogix L32E in OPC Server OR

  Anyone know how to contact the CompactLogix L32E Lookout 6.5.

  It doesn't seem to be a driver for it in the OPC server from OR.  Can someone point me in the right direction.

  I thought that the 5300 ENI:CompactLogix would work, but it does not work.

  Thanks to the folks at Kepware. I was able to get this working for CompactLogix L32E.

  Step 1: In the OPC Server OR create a new channel. The channel name can be anything you want.

  Step 2: Device driver will be ControlLogix Ethernet.  You can also enable diagnostics if you want.

  Step 3: Network adapter. I used default.

  Step 4: Write only the latest values.  Service at 10. (These are the default settings and are recommended.)

  Step 5: Finish new channels configuration

  Step 6: Click the icon to create the new device

  Step 7: The name of the device can be selected.

  Step 8: Select model of device in this case CompactLogix 5300

  Step 9: Device for me ID been XXX.XXX.XXX.XXX, 1, 0 IP address (note the 1 redirects the path at the bottom of basket.) 0 to the location where the processor is)

  Step 9: Device synchronization.  Leave the default values.

  Step 10: Automatic demotion leave unchecked.

  Step 11: Leave default values do not generate start remove create and enable the subgroups

  Step 12: Port and watchdogs with default settings

  Step 13: Options of the project leave default. (In my case, I've changed to short because that's what most of my tags was)

  Step 14: Create tagname of the device.

  Step 14: Finishing Device setup.

  You now have two options.

  Option 1: Start creating labels according to your needs. (This is what I did)

  Option 2: Newly created device right click and select property.  Then select the database creation and click auto create.

  Go to the belvedere and create the new driver.

  Select Client OPC

  The server name will be on the menu drop down. National Instruments: NIOPCServers

  Click OK

  You must be done and smiling.

• LabVIEW OPC error

  Hello

  I am trying to bind a Boolean buttons on Panel before Labview for items on an OPC server. (I'm under LabVIEW Professional Develompent system version 9.0)

  I'm hoping to use Labview as a client for a SCADA application for a client.

  I can go to and see all my OPC tags when using Datasocket as the method of data binding.

  When I run the VI, I see a red light next to the buttons on the front panel, giving the following error message: "error: cannot add the item to the OPC group.»

  I tried several other test of the OPC clients to test whether the problem is with the server or the client. I was able to add (and write) at the points of each test client I've tried outside of Labview.

  However, I noticed that I had to set a path for the OPC items, when you use a Client of Quick Kepware OPC, otherwise, they would not add. I guess I might have to do the same thing in LabVIEW, but I can't figure out how to do this.

  Can you please indicate.

  Thank you.

  Thanks for the info. I had actually heard than before. I know that the server has worked with OPC clients that supported only the OPC 2.0 because I have tested, so I assume it would work with Labview.

  However, after a more thorough investigation of this problem I have since discovered that there is a known bug with the version of the server OPC I use and Labview. I guess that explains all the problems I had.

  Thanks for all the answers.

• How to install the OPC Server with the Application Setup

  Hi all,

  I make the datalogging progam in the PLC via modbus communication using the OPC server.

  1. I got configer the opc via the Project Explorer client some time it works perfectly, but when I run it by the next day, he cannot communicate with an OPC server but the OPC server is to communicate with the PLC. When I right click on the properties of the customer e/s in the exploer project opc and make any change and still run the application it works where is the problem.

  2. the second problem is by building the installer that will be installered to my PC targate OPC server. Bacuse I had installed the application on the computer target just for testing but OPC Server havn't installed even if there is no option for adding the OPC while bulding server.

  Serdar, SALVATION

  Thanks for the reply I saw your example, your idea is ok, but if I have more then 100 and with different types of data tag then where is the problem to manage all these tags.

  Now, what I had done I took the express to create vi or configer server I/O and give the name of the process even as file name as opcdemomo and same server name reference in the Project Explorer and restart and scream in low tow and three times it works I havn't get any problem.but which is not the right method. 

• run the command VI OPC without OPC

  Hi all

  I develop a VI for use with a mutual FUND. Because the installation is no place for the development of client software, I brought the PC with Labview & OPC to my office where I want to develop the VI. Here the facility is not connected to the computer and I get the error

  1950679035 obviously because labview cant properly read some variables of the OPC.

  Do you know how can I work around this error without deleting the variable according to mutual FUNDS? He would e end for me to set it at zero or something.

  Thanks for the answers in advance!

  You want to communicate with the OPC server without it existing?

  A better plan would be to invest in a headset.  Put them in, sitting in your office and rock on the program.  It will be much more beneficial for you.

  Otherwise, you can emulate the behavior of the OPC.  To do this, you essentially want to build a second VI that does SOMETHING with your 'tags '.  What it will do is update the Variables shared in your project.   Later, you will need to change all that in your code.  I don't really see the interest of working from home on a project like this.

  Alternatively, you can configure your computer so that you can remote inside of the House.  But, then you'll deal with the lag associated with.