Writing out to Universal Robot dashboard socket 29999 through TCP/IP from AB Complogi

Nortech

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• Jul 17, 2019

• #1

Hi All,
Has anyone written commands to a Universal robot dashboard through TCP/IP socket from an Allen Bradley Compact logix PLC?

I'm using the Modbus TCP Master Sample Application example from the rockwell website and seem to be getting connected momentarily before the connection is dropped.

Has anybody got any experience with this?

Thanks

 

Contr_Conn

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• Jul 17, 2019

• #2

Did you try to get a wireshark capture to see who is closing connection?

 

Nortech

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• Jul 17, 2019

• #3

Hi Contr_Conn,
No. I didn't but following through the Rockwell sample code, I can see that the PLC closes the connection due to no response from the robot despite the Initial MSG blocks seemingly creating and connecting to the socket successfully. Have you done this before?
Thanks

 

Nortech

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• Jul 17, 2019

• #4

https://www.rockwellautomation.com/...cd6b-0e47-d66e-6a68d14122f8;deepLinking=false

This is the link to the sample code download (Its the second one (for compactlogix))

 

Contr_Conn

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• Jul 17, 2019

• #5

Before you dig into the working code you should see what is on the wire.
Then it will give you a direction.
You may need to replace your slave device with some Modbus simulator and get it working this way.
There is also Quick Start technote that has exact example.

 

Nortech

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• Jul 17, 2019

• #6

I am not sure how to do this.

I can communicate with the robot socket from my PC using SocketTest v 3.0.0

How do I check whats on the wire?

Thanks

 

Contr_Conn

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• Jul 17, 2019

• #7

https://lmgtfy.com/?q=wireshark&s=g

https://rockwellautomation.custhelp.com/app/answers/detail/a_id/576972

 

Last edited: Jul 17, 2019

Geoff White

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• Jul 18, 2019

• #8

Try using a socket comms test program like hercules test utiiity. That way you can eliminate problems at the other end too.