Intermittent connection in Ethernet/IP

[ScottRyan]

Hello, 

I am looking for help with ethernet/ip on a unistream 7".  I am intermittently connecting to a Mettler Toledo scale.  It will connect very quickly and immediately disconnect.  I have attached pictures of the eip scanner node struct tags for both scenarios.   I have also attached my program.  I have looked at multiple scanner eip samples and followed the unitronics  ethernet/ip video on youtube.  I have still not had any luck keeping a connection.  I am not getting any error on the scale controller either.   Any help would be greatly appreciated.  Thank you in advance. 

 

Scott

 

[Dave]

Hi Scott.

I had similar results before(different hardware, same symptoms). In my case, the settings for the EIP were the problem. Check your Configuration Assembly instance #/size and also try with the "Use Run Idle for ....." and check-boxes checked.

[ScottRyan]

Thanks for the reply Dave.  I just tried the Use run idle check boxes without a different result.  As far as the Configuration Assembly instance #, I had in there 1 originally.  I have tried some different numbers for the heck of it, but still no connection that stays. I got my instance values from a project I recently did, but in studio 5k   (AB/Rockwell).    Do you know why it would be different?  I realize now how spoiled I am with being able to upload the EDS files....   

 

-Scott

[Pista]

Hi Scott,
I see that you are trying to implicyt communication.
The Alan Bradly should have 128 bits on the input side and also on output.
Size at AB. is 8 byts, x (16bits) = 128 bits
Size at Unitronics is 8 bytes, x (8bits) = 64 bits.
Therefore, you need to rebuild global tags Input_Scale and Output_Scale to
had 128 bits.
Do not forget to mark the Run Idle O2T.

[ScottRyan]

For the next guy...

I was able to communicate to my components.  It took a lot of playing.  Things that helped me are,:

• Opening the EDS in a text editor (ie, Notepad++) and verifying the instances/size of Input/Output/Config.   
• While trying to connect look at the hex code for the initialization status of your component's EIP Scanner Node Struct while online.  If not connected and have a code check here for a solution: https://unitronicsplc.com/Download/SoftwareHelp/UniLogic_Knowledgebase/Communications/EthernetIP_Connection_Status_Messages.htm   
• 'Use Run Idle For O2T' checked. 

 

Hope this helps someone else. 

 

-Scott