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PLC4X The Industrial IoT adapter

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How to S7-1500 network disconnected but S7HDefaultNettyPlcConnection The connected() method is still true

cptjackwu opened this issue · comments

commented

What happened?

An exception occurs when I call the following method，
PlcReadResponse response = plcReadRequest.execute().get(10, TimeUnit.SECONDS);

java.util.concurrent.ExecutionException: org.apache.plc4x.java.api.exceptions.PlcRuntimeException: Disconnected
at java.base/java.util.concurrent.CompletableFuture.reportGet(CompletableFuture.java:395)
at java.base/java.util.concurrent.CompletableFuture.get(CompletableFuture.java:2022)
at com.wh.subscription.S7Client.execute(S7Client.java:392)
at com.wh.subscription.S7Client.readValues(S7Client.java:328)
at com.wh.subscription.PlcSubscription.sendRequest(PlcSubscription.java:83)
at com.wh.subscription.PlcSubscription$WatchdogTimer.lambda$kick$0(PlcSubscription.java:126)
at com.wh.subscription.PlcSubscription$WatchdogTimer.lambda$runnableNullThrowWrapper$1(PlcSubscription.java:134)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)

I want to use S7HDefaultNettyPlcConnection isConnected equal to false and then reconnect. This method doesn’t work. What should I do?

if (this.plcConnection == null || !this.plcConnection.isConnected()) {
this.plcConnection = PlcDriverManager.getDefault().getConnectionManager().getConnection(url);
}

Version

v0.11.0

Programming Languages

  • plc4j
  • plc4go
  • plc4c
  • plc4net

Protocols

  • AB-Ethernet
  • ADS /AMS
  • BACnet/IP
  • CANopen
  • DeltaV
  • DF1
  • EtherNet/IP
  • Firmata
  • KNXnet/IP
  • Modbus
  • OPC-UA
  • S7
commented

Hi @cptjackwu,
I think this might be related to a problem I observed with the serial transport that I wasn't able to configure the settings for the serial transport as it simply wasn't processed. I know that this once worked, but not quite sure what changed. I'll be investigating this once I find some time.
If you however want to give it a try, I'm happy to help.
Chris

commented

Hello,

With Siemens PLCs, you can wait a monitoring time of about 6-8 seconds for it to consider the dropped connection (I have tested it on S7-300 and S7-400), so the traffic monitor is set to that time.

In short, you can disconnect the cable for 3 seconds and that method will return that you are connected.

I am going to repeat my tests with version 0.11.0 and the PLCSIM of 1500.

I do not recognize these objects "com.wh.subscription.S7Client.execute(S7Client.java:392)", I imagine they are from your application.

If you enter the connection URL it will help me.

Kind regards,

commented

And please ignore my mumbling ... my response was intended for another issue that popped up .. sorry for the confusion ;-)