Hello Matthias, Looks like it was again just an error with missing JARs. Reading works and with writing the access is currently denied. Do you guys have a way to change this accessLevel over the API or do I have to do it on the server itself?
Thanks! Titus Am Sa., 2. Mai 2020 um 11:28 Uhr schrieb Titus Hartmann <[email protected]>: > > Hello Matthias, > > > thank you for the response! > > > I tryied with the latest version of Milo 0.4.1 but I got an error with that: > > > [main] INFO org.apache.plc4x.java.PlcDriverManager - Instantiating new > PLC Driver Manager with class loader > jdk.internal.loader.ClassLoaders$AppClassLoader@c387f44 > > [main] INFO org.apache.plc4x.java.PlcDriverManager - Registering > available drivers... > > [main] INFO org.apache.plc4x.java.PlcDriverManager - Registering > driver for Protocol opcua (OPC UA (TCP)) > > [main] INFO org.apache.plc4x.java.opcua.connection.OpcuaTcpPlcConnection > - Configured OpcuaTcpPlcConnection with: host-name 127.0.0.1 > > [NonceUtilSecureRandom] INFO > org.eclipse.milo.opcua.stack.core.util.NonceUtil - SecureRandom seeded > in 1ms. > > [main] INFO org.eclipse.milo.opcua.sdk.client.OpcUaClient - Eclipse > Milo OPC UA Stack version: 0.4.0 > > [main] INFO org.eclipse.milo.opcua.sdk.client.OpcUaClient - Eclipse > Milo OPC UA Client SDK version: 0.4.0 > > [main] INFO org.titus.plc4x.OpcReader - Verbindung ist aufgebaut... > > [main] INFO org.titus.plc4x.OpcReader - Anfrage gesendet... > > [main] ERROR org.titus.plc4x.OpcReader - Konnte keine Verbindung aufbauen > > java.util.concurrent.ExecutionException: java.lang.ClassCastException: > class org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId > cannot be cast to class > org.eclipse.milo.opcua.stack.core.types.builtin.NodeId > (org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId and > org.eclipse.milo.opcua.stack.core.types.builtin.NodeId are in unnamed > module of loader 'app') > > at > java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395) > > at > java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2070) > > at org.titus.plc4x.OpcReader.main(OpcReader.java:29) > > Caused by: java.lang.ClassCastException: class > org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId cannot > be cast to class > org.eclipse.milo.opcua.stack.core.types.builtin.NodeId > (org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId and > org.eclipse.milo.opcua.stack.core.types.builtin.NodeId are in unnamed > module of loader 'app') > > at > org.apache.plc4x.java.opcua.connection.OpcuaTcpPlcConnection.encodeFieldItem(OpcuaTcpPlcConnection.java:115) > > at > org.apache.plc4x.java.opcua.connection.OpcuaTcpPlcConnection.lambda$read$8(OpcuaTcpPlcConnection.java:404) > > at > java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1771) > > at > java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1763) > > at > java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) > > at > java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) > > at > java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) > > at > java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) > > at > java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177) > > > > After Debugging I found out that it was a Problem with the Version so > I used Milo 0.3.6 and the Problem with the Connection was gone. But > another error appeared: > > > [main] INFO org.apache.plc4x.java.PlcDriverManager - Instantiating new > PLC Driver Manager with class loader > jdk.internal.loader.ClassLoaders$AppClassLoader@c387f44 > > [main] INFO org.apache.plc4x.java.PlcDriverManager - Registering > available drivers... > > [main] INFO org.apache.plc4x.java.PlcDriverManager - Registering > driver for Protocol opcua (OPC UA (TCP)) > > [main] INFO org.apache.plc4x.java.opcua.connection.OpcuaTcpPlcConnection > - Configured OpcuaTcpPlcConnection with: host-name 127.0.0.1 > > [NonceUtilSecureRandom] INFO > org.eclipse.milo.opcua.stack.core.util.NonceUtil - SecureRandom seeded > in 1ms. > > Exception in thread "main" java.lang.NoClassDefFoundError: > org/eclipse/milo/opcua/binaryschema/parser/BsdParser > > at > org.eclipse.milo.opcua.sdk.client.api.config.OpcUaClientConfig.builder(OpcUaClientConfig.java:96) > > at > org.apache.plc4x.java.opcua.connection.OpcuaTcpPlcConnection.connect(OpcuaTcpPlcConnection.java:242) > > at > org.apache.plc4x.java.PlcDriverManager.getConnection(PlcDriverManager.java:73) > > at org.titus.plc4x.OpcReader.main(OpcReader.java:18) > > Caused by: java.lang.ClassNotFoundException: > org.eclipse.milo.opcua.binaryschema.parser.BsdParser > > at > java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602) > > at > java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) > > at > java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) > > ... 4 more > > > > My Code is as follows (but the error is the same with the > ManualPLC4XOpcua Code): > > > public class OpcReader { > > private static final Logger logger = > LoggerFactory.getLogger(OpcReader.class); > > public static void main(String[] args) { > > try ( OpcuaTcpPlcConnection opcuaConnection > = (OpcuaTcpPlcConnection) new > PlcDriverManager().getConnection("opcua:tcp://localhost:5801/OPC_Simulation_Server?discovery=false")) > { > > logger.info("Verbindung ist > aufgebaut..."); > > PlcReadRequest.Builder > readBuilder = opcuaConnection.readRequestBuilder(); > > readBuilder.addItem("Menge", > "ns=2;i=4"); > > > PlcReadRequest request = > readBuilder.build(); > > logger.info("Anfrage gesendet..."); > > PlcReadResponse response = opcuaConnection.read(request).get(); > > logger.info("Antwort der Steuerung:"); > > for (String fieldName : > response.getFieldNames()) { > > logger.info("{} - > {}", fieldName, response.getResponseCode(fieldName)); > > if > (response.getResponseCode(fieldName) == PlcResponseCode.OK) { > > > logger.info("{} - {}", fieldName, response.getObject(fieldName)); > > } > > } > > } catch (Exception e) { > > logger.error("Konnte keine > Verbindung aufbauen", e); > > } > > } > > } > > > > As a OPC Server I use a Python tool called FreeOpcUa > (https://github.com/FreeOpcUa/python-opcua) and just simply set up > some variables with: > > > from opcua import Server > > server = Server() > > url = "opc.tcp://localhost:5801" > > server.set_endpoint(url) > > name = "OPC_Simulation_Server" > > addspace = server.register_namespace(name) > node = server.get_objects_node() > Param = node.add_object(addspace, "Parameters") > ANr = Param.add_variable(addspace, "Auftragsnummer", 0) > Stk = Param.add_variable(addspace, "Stückzahl", 0) > Menge = Param.add_variable(addspace, "Menge", 0) > ANr.set_writable() > Stk.set_writable() > Menge.set_writable() > server.start() > > print("Server started at {}".format(url)) > > > Thank you for your help and advice. > > Greets > > Titus > > Am Do., 30. Apr. 2020 um 23:33 Uhr schrieb Strljic, Matthias Milan > <[email protected]>: > > > > Hello Titus, > > > > > > the driver supports read, write and subscribe. So you should be able to > > write values to an OPC UA server. > > > > If you could provide there some meta data to your issue we can perhaps help > > you with that? > > > > What kind of node type you try to read/write? > > > > > > The ManualPLC4XOpcua test class includes for all request types some small > > examples. > > > > URL to ManualPLC4XOpcua: > > https://github.com/apache/plc4x/blob/rel/0.6/plc4j/drivers/opcua/src/test/java/org/apache/plc4x/java/opcua/ManualPLC4XOpcua.java > > > > > > To achieve the best results you could build the latest version of the 0.6 > > branch and use that until we publish the 0.6.1 release candidate. > > > > > > Best regards > > > > Matthias > > > > ________________________________ > > Von: Titus Hartmann <[email protected]> > > Gesendet: Donnerstag, 30. April 2020 10:01:27 > > An: [email protected] > > Betreff: Re: OPC UA communication > > > > Hello Matthias, > > > > thank you for your response! Is there any Option to get around this so > > that I can read some nodes for test cases? > > The other question that comes to my mind is if there is a write > > methode like the one in the S7 Adapter already implemented? Or is > > there help needed? > > > > I started my program this morning and there was another error present. > > Could you help me out with this aswell? > > > > java.util.concurrent.ExecutionException: java.lang.ClassCastException: > > class org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId > > cannot be cast to class > > org.eclipse.milo.opcua.stack.core.types.builtin.NodeId > > (org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId and > > org.eclipse.milo.opcua.stack.core.types.builtin.NodeId are in unnamed > > module of loader 'app') > > at > > java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395) > > at > > java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2070) > > at org.titus.plc4x.OpcReader.main(OpcReader.java:44) > > Caused by: java.lang.ClassCastException: class > > org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId cannot > > be cast to class > > org.eclipse.milo.opcua.stack.core.types.builtin.NodeId > > (org.eclipse.milo.opcua.stack.core.types.builtin.ExpandedNodeId and > > org.eclipse.milo.opcua.stack.core.types.builtin.NodeId are in unnamed > > module of loader 'app') > > at > > org.apache.plc4x.java.opcua.connection.OpcuaTcpPlcConnection.encodeFieldItem(OpcuaTcpPlcConnection.java:115) > > at > > org.apache.plc4x.java.opcua.connection.OpcuaTcpPlcConnection.lambda$read$8(OpcuaTcpPlcConnection.java:404) > > at > > java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1771) > > at > > java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1763) > > at > > java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) > > at > > java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) > > at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) > > at > > java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) > > at > > java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177) > > > > Thank you and greets > > Titus > > > > Am Do., 30. Apr. 2020 um 09:35 Uhr schrieb Strljic, Matthias Milan > > <[email protected]>: > > > > > > Hello, Titus, > > > > > > the discovery part is an optional parameter. By default the opc ua driver > > > uses the discovery endpoint of an opc ua server to get the correct > > > endpoint description. > > > If the parameter is set to false, it ignores this discovery result and > > > forces the specified ip + port combination. We had to implement this > > > option because opc ua servers do not always seem to be configured > > > correctly. > > > But you are right, the documentation part is missing there. We will > > > address this soon to avoid these ambiguities. > > > > > > > > > The bug you mentioned is already fixed in the upcoming versions 7.0 and > > > 6.1 and should be released soon. > > > > > > Greetings > > > Matthias > > > > > > > > > ________________________________ > > > Von: Titus Hartmann <[email protected]> > > > Gesendet: Mittwoch, 29. April 2020 14:57:35 > > > An: [email protected] > > > Betreff: OPC UA communication > > > > > > Hello everyone, > > > > > > following the mail addressed to Julian I have a Question regarding the > > > communication between Prosys OPC UA and PLC4X. > > > > > > In the demo Julian used in his Webinar there is this Connection String: > > > > > > "opcua:tcp://10.8.0.2:53530/opcua/SimulationServer?discovery=false&username=tester&password=test1234" > > > > > > I’m wondering what the discovery part does. Can you help me with this? > > > Using this Code the following error appeared: > > > > > > org.apache.plc4x.java.api.exceptions.PlcConnectionException: Unable to > > > discover > > > URL:opc.tcp://192.168.222.27:53530/OPCUA/SimulationServer?discovery=false/discovery > > > > > > at > > > org.apache.plc4x.java.opcua.connection.OpcuaTcpPlcConnection.connect(OpcuaTcpPlcConnection.java:187) > > > > > > at > > > org.apache.plc4x.java.PlcDriverManager.getConnection(PlcDriverManager.java:73) > > > > > > at org.titus.plc4x.OpcReader.main(OpcReader.java:48) > > > > > > After Debugging I noticed that the URL is not correctly separated. > > > Thats why the discovery part is ignored. Not sure why it worked in the > > > demo though. > > > > > > Do you guys have any idea how I could fix this? > > > > > > Thanks and best regards > > > > > > Titus
