14.2s Java jvnrun Issue

Ewon Support Basic and Java
#1

I am trying to deploying a jvmrun file:
#IOSERVER
-heapsize 1M -classpath /usr/ReadingTagsV2.jar -emain prab.ewon.readingtags.TagMonitorApplication

If I start the eWon and deploy the jar file from Eclispe everything runs fine. When I deploy the jvmrun file and reboot the eWon, the communucation between the PLC and the eWon for the IOServer fails. There is no communication. I can see the IOServer starting in the logs and than the program starts.

Do I need to find a way to delay the starting of the program until after the IOServer starts?

Thanks

Rich

#2

Hi Rich,

Did you make this IO server or did you grab this from our tech forum? Can you give me some more information on how you setup this IO server?

-Tim

#4

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image1493×714 54.9 KB

We are using the default event handeler to read the tags.

import com.ewon.ewonitf.DefaultEventHandler;
import com.ewon.ewonitf.SysControlBlock;

public class TagMonitorApplication {

public static void main(String[] args) throws Exception {

	SysControlBlock SCB = new SysControlBlock(SysControlBlock.INF);
	String serialNumber = SCB.getItem("SerNum");

	TagEvent TagEvt = new TagEvent(serialNumber);

	DefaultEventHandler.setDefaultTagValueListener(TagEvt);
	DefaultEventHandler.runEventManager();
}

}

#5

can you send me your full .jar file for this?

#6

ReadingTagsV2.zip (19.6 KB)

Here’s the jar file.

#8

Hi Rich,

I heard this back from my colleague on what issue you might be running into.

"They try to run an “IOServer” Java program --> See #IOSERVER flag in the jvmrun file while the IOServer Java Class is not used.

This may explain why they see problems.

Could they try by removing the line #IOSERVER from the JVMRUN file?"

-Tim