Hi Jonas and welcome to the PLC4X project :-)
I’ll do my best to help you with your setup … first … please let me ask you
which version of PLC4X you are using?
I’m asking cause we deleted and replaced ALL drivers from 0.6.0 and replaced
them in 0.7.0 and beyond with ones generated by our in-house framework.
Unfortunately I have seen that the migration of the Beckhoff drivers was never
finished, but the person doing it disappeared.
I will do my best to pick up the ball and finish this asap … even if I actually
don’t have the time to do it, the feeling of having this important driver
un-finished is worse than keeping my deadlines ;-)
Chris
Von: "Hillenbrand, Jonas (wbk)" <jonas.hillenbr...@kit.edu>
Antworten an: <dev@plc4x.apache.org>
Datum: Mittwoch, 29. Juli 2020 um 11:25
An: "dev@plc4x.apache.org" <dev@plc4x.apache.org>
Betreff: How to compose Read requests for ADS Protocol with PLC4X?
Hi there,
I’m working on using the PLC4X framework within my research projects involving
datalogging from Beckhoff PLC via ADS protocol.
I was able to connect with the PLC using the following code, but it fails on
the line where the read request is executed:
PlcConnection plcConnection = null;
String connectionStr = "
ads:tcp://127.0.0.1:48898/5.23.164.94.1.1:851/129.254.235.187.1.1:32835”;
try {
plcConnection = new
PlcDriverManager().getConnection(connectionStr);
if (this.plcConnection.isConnected()){
if (!this.isAdsReadable() ||
!this.isAdsWritable() || !this.isAdsSubscribable()) {
return false;
}
this.logger.log("Connected successfully with
" + connectionStr);
return true;
} else {
this.logger.log(Level.ERROR, "Could not
connect with " + connectionStr);
return false;
}
} catch (PlcConnectionException e) {
// TODO Auto-generated catch block
this.logger.log(e);
return false;
}
PlcReadRequest.Builder builder =plcConnection.readRequestBuilder();
builder.addItem(“BOOL1”, "BOOL1:BOOL"); //
Boolean variable in GVL (global) list of SPS Project
PlcReadRequest readRequest = builder.build();
PlcReadResponse response = null;
try {
response = readRequest.execute().get();
// CODE FAILS HERE
} catch (InterruptedException e) {
// TODO Auto-generated catch block
this.logger.log(e);
} catch (ExecutionException e) {
// TODO Auto-generated catch block
this.logger.log(e);
}
Console Output:
Connected successfully with
ads:tcp://127.0.0.1:48898/5.23.164.94.1.1:851/129.254.235.187.1.1:32835
Exception in thread "main"
org.apache.plc4x.java.api.exceptions.PlcRuntimeException: Non error code
received Result{AdsReturnCode{hex=0x0710, dec=1808, description='symbol not
found', possibleCauses='', solution=''}}
at
org.apache.plc4x.java.ads.connection.AdsAbstractPlcConnection.lambda$mapFields$3(AdsAbstractPlcConnection.java:184)
at
java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708)
at
org.apache.plc4x.java.ads.connection.AdsAbstractPlcConnection.mapFields(AdsAbstractPlcConnection.java:163)
at
java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at
java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
at
java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
at
java.base/java.util.LinkedList$LLSpliterator.forEachRemaining(LinkedList.java:1242)
at
java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
at
java.base/java.util.stream.ForEachOps$ForEachTask.compute(ForEachOps.java:290)
at
java.base/java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:746)
at
java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
at
java.base/java.util.concurrent.ForkJoinTask.doInvoke(ForkJoinTask.java:408)
at
java.base/java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:736)
at
java.base/java.util.stream.ForEachOps$ForEachOp.evaluateParallel(ForEachOps.java:159)
at
java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateParallel(ForEachOps.java:173)
at
java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233)
at
java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497)
at
org.apache.plc4x.java.ads.connection.AdsAbstractPlcConnection.mapFields(AdsAbstractPlcConnection.java:157)
at
org.apache.plc4x.java.ads.connection.AdsAbstractPlcConnection.read(AdsAbstractPlcConnection.java:103)
at
org.apache.plc4x.java.base.messages.DefaultPlcReadRequest.execute(DefaultPlcReadRequest.java:44)
at
net.sytes.botg.ads.MyADSClient.executeReadRequest(MyADSClient.java:108)
at
net.sytes.botg.ads.UnitTest_MyADSClient.test2(UnitTest_MyADSClient.java:60)
at
net.sytes.botg.ads.UnitTest_MyADSClient.main(UnitTest_MyADSClient.java:44)
Could anybody offer some help? Am I constructing the item for the read request
correctly, what if I’m trying to read variables in a subroutine let’s say in
the Project “1Achser” my PLC Project name is “SPSObject” and I have a PRG block
named “MainGUI”, in there I have the variable “CurPos [LREAL]”, how would I
conceive the addItem Method? --> builder.addItem(“CurPos”,
"1Achser.SPSObject.MainGUI.CurPos:LReal")?
Anyhelp would be appreciated.
And by the way, I like the idea of PLC4X very much and love to contribute,
given that I can make it work for my setup :D
Best Regards
Jonas
