I am trying to access the server address space and I am getting this Error.
LabVIEW: (Hex 0xFFFA8EBB) The node path refers to a node that does not exist in the server address space
The server is on a Plc and I am connected via Lan. the information i have is
Server-URL: opc.tcp://192.168.1.135:4840
Namespace-URI: urn:B&R/pv/
I have tried different things but i am not sure how to access the variables in address space. any suggestions would be helpful
B&R Publishes the Endpoints of your data in a fairly consistent manner. If you use a OPC UA browsing tool, you will find that the address space visible to Labview should start with
PLC.Modules.<Default>
B&R Automation Studio requires that you complete the default OPC UA configuration. Within that configuration you would need to enable the nodes/endpoints in question. You can then access these nodes in Labview.
You should check the following:
Under your controller, confirm that you have enabled OPC UA in the
configuration view.
Next, check that you have added a OPC UA Default View File to your
configuration for the hardware you are running.
Finally, in that file, ensure that you have enabled the endpoint/variable and that
it has at least the read permission. The quickest and most expedient
way is to ensure that you have gone to the top level of the OPC UA
Default View File and added the Everyone role and that Read is
enabled. This will cascade down to all enabled endpoints.
Save this and make sure it has been built and added to your controller. You should be able to access endpoints then.
For example, if I have a program called "LampController" running in B&R with a variable called switchState it would be addressed by:
PLC.Modules.<Default>.LampController.switchState
You need to use %26; in place of an ampersand. The ampersand is used to delimit the URI from the query segment. It's pretty unusual to even have an ampersand in a URI. Are you sure you typed it right?
Related
In Order use a PLC as a Client (formerly “Slave”), one has to configure the PDO channels, since the default values of the manufacturer are often not suitable. In my case, I need the PDOs so send INT valued instead of the default UNSIGNED8 (see. Picture).
Therefore my question: What kind of workflow would you recommend, to map the CANopen Client PDO channels?
I found the following workflow suitable, however I appreciate any improvements and recommendations from your side!
Start by locating the .eds file from the manufacturer. The image show this in the B&R Automation Studio Programming Environment
Open the file in a eds. Editor. I found the free Vector CANEds Editor very useful. Delete all RxPODs and RxPDO mappings that you don’t need.
Assign the needed Data Type (e.g. INTEGER16) and Channel Name (“1 Byte In (1)”).
Add the necessary PDOs and PDO mapping from the database. (This might actually be a bug, but if you just edit the PDOs without deleting and recreating them, I always receive error messages)
Map the Date to the Channels
Don't forget to write the number of channels in the first entry (in this image: 1601sub0)
Check the eds file for Errors (press F5) and copy&paste the eds file to the original location point 1.)
Add the PLC Client device in Automation Studio and you should see the correct mappings.
(PS: I couldn't make the images smaller ... any recommendations about formating this question are welcome!)
Lemme come straight into this.
Well, I have implemented Nifi to localhost. It's working well and everything seems to be perfect.
I have made many different flows with headers of course within the cluster as below.
Cluster
When I right click the header and go to "View configuration" go to "Properties" will see as follows.
Processor details
You can see the "Listening Port" that is 10004 and a "hostname" as well. Then there is "Allowed path" as can be seen.
Now If I want to access this specific header I have to hit using 10.0.0.18:10004/spec/transform.
Now the issue is, I have many different headers which are having a different listening port that is assigned by me. NIFI is not allowing me to assign the same port for every flow I make. but I have to assign different port every time I make a new flow. I just want to assign port 10004 to every other flow and just differ them using the "Allowed path".
How come I make this possible. I have to always assign new port to every new flow. Is there a way to do that. Hope you guys understand what am I actually willing to have. Hope to have your answers soon.
Thank you
You can have one HandleHttpRequest at the beginning of your flow listening on port 10004, and set the "Allowed Paths" property to a regular expression that matches all of the paths you want to support. HandleHttpRequest will add the path as an attribute to each flow file named "http.context.path", so you could then use a RouteOnAttribute to route each path to a different part of the flow.
As Bryan Bende
but in nifi 1.14.0 that is attribute: http.request.uri
First, appreciate you giving this a look. I have an ancient piece of software that writes old Linear PCMCIA cards. In my case, I want to use it in a specialized piece of gear called a Tech2. The software in question is called Memory Card Explorer. Now, I know for a fact it works in Windows XP with Native PCMCIA slots. However, I have a slot that is built on a Dual Systems adapter (basically an Expresscard to PCMCIA adapter).
The issue arises when following the instructions on installation issues, the program refuses to locate the Dual Adapter. Here's the example given in the manual:
"Use a similar address to the PCMCIA adapter. That address can be found using msinfo32.exe.
Eg: if the PCMCIA socket has a memory resource of F8000000 then use a MCE window command of F80D0000 using command line option of WF80D0."
So I get my adapter address which is F7FFF000 but have no idea where to add the "d" to the resource address then change it to a command. I've tried WF7FD0. Am I missing something simple in how these addresses are truncated for command line? Is there a calculator that does the conversion for you somewhere?
Thanks.
It looks like the pattern is to add 0x000D0000 to the address, take the five high nibbles of the address (which makes sense, since these sorts of addresses are typically page-aligned the bottom 3 nibbles will always be 0 on a system with 4KiB pages), and prepend 'W'. Try WF80CF.
How can you change your IP Address using visual basic please? I havnt been able to find anything useful anywhere so i was just wondering if I could get some help on here?
Im not onabout the external Ip address. I know that cannot be changed(I have a static one from my isp.) Im onabout changing the internal ipaddress... for example changing from: 192.168.1.150 to 10.0.0.125 –
Thanks
Chris
You could use some Windows scripting. It gets a little messy but you could create the script in VB.Net, write it to your hard drive and then execute it. When done, you can delete the script.
Here is an example of a script that changes the IP Address (and some other related fields):
http://www.wincert.net/forum/topic/40-change-ip-configuration-via-vb-script/
Then, you would execute it in VB.Net by calling
Process.Start("<The path of your .vbs file here>")
Good luck.
Your IP Address is leased to you via your ISP when you go online - you can't just "change it". If your ISP uses Dynamic IP leasing, you can switch off your router/modem for around 5 minutes, and reconnect - at which point you'll receive a new IP.
The only way to replicate this via VB would be to disconnect the user from a modem-based service within your application. But in this case, I'd hazard a guess that clicking the "disconnect" button would be an easier solution for the user.
you may not need to write any script to do this. And you dont need 2 network adapters as the only way to do this. in windows the network adapter can be assigned several IP addresses at the same time. go into network properties ipv4 tcp/ip settings advanced. you can put several ip addresses and masks. so if you have one pc but are using 2 different networks, just put 2 addresses in, then whichever network is connected use it normally.
if you have a network gadget like a new router and its on 192.168.0.200 and you know its going to be set to 10.1.1.x after you login, assign the computer 2 IPs like 192.168.0.100 and then 10.1.1.100.
Within VB.NET, trying to find an easy way to in a sense check the check-box "Use Windows to configure my Wireless Network Settings". This is an option that forces windows to use your wireless over third-party programs that may try to steal control. I am aware this requires to have WZC enabled within services and that's something that can be easily accomplished one way or another.
I doubt or rather cannot find a proper registry value or API call to check or initiate such a task.
I would use a registry-recorder to record the changes when manually changing the value, then its a piece of cake to implement the register change in code.
There are plenty programs that can be used to see what changes has been done in the registry, here are one free: http://www.kephyr.com/systemsherlocklite/index.phtml, but google may find more or better variants out there.
With this tool, create a registry dump:
systemsherlock.exe -dump d1.dat -regdirs HKEY_ROOT
Do the change in the wireless network settings
Do a new dump of the registry:
systemsherlock.exe -dump d2.dat -regdirs HKEY_ROOT
And last, compare them and see what has changed:
systemsherlock.exe -compare d1.dat d2.dat