# IRC5 Ethernet IP Master to C.Logix

**URL:** <https://tech-community.robotics.abb.com/t/irc5-ethernet-ip-master-to-c-logix/3108>\
**Category:** Robot Controller\
**Created:** [October 14, 2009, 9:35pm UTC](https://tech-community.robotics.abb.com/t/irc5-ethernet-ip-master-to-c-logix/3108 "2009-10-14T21:35:14Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Mike\_Dale](https://avatars.discourse-cdn.com/v4/letter/m/58956e/32.png) [@Mike\_Dale](https://tech-community.robotics.abb.com/u/Mike_Dale)\
**Post date:** [October 14, 2009, 9:35pm UTC](https://tech-community.robotics.abb.com/t/irc5-ethernet-ip-master-to-c-logix/3108/1 "2009-10-14T21:35:14Z")

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Hi,

I have an IRC5 with the Ethernet IP Master option. I need an AB Contrologix L61 to be the slave (I eventually will have several L61’s as slaves). After missing a bit of hardware, an incorrect keystring and an out of date baseware version I think I’m pretty close to achieving connectivity. What I am totally confused about is the Assembly Instance at the IRC5 end and the Contrologix end.

Anyone ever managed this arrangement?

Thank for any info.

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**Author:** ![tbaumg](https://avatars.discourse-cdn.com/v4/letter/t/bbe5ce/32.png) [@tbaumg](https://tech-community.robotics.abb.com/u/tbaumg)\
**Post date:** [October 28, 2009, 8:18pm UTC](https://tech-community.robotics.abb.com/t/irc5-ethernet-ip-master-to-c-logix/3108/2 "2009-10-28T20:18:41Z")

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I too am having issues with this same thing. Does anyone at ABB have some examples of how to get Ethernet/IP communicating with any AB PLC’s?

I’m still trying different configurations such as setting up the robot as an IP\_INTERNAL\_SLAVE, and trying to make the PLC the master but not sure how to configure the PLC to communicate this way.

Any help or documentation would be greatly appreciated.

Thanks,

Toby

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**Author:** ![ateg](https://avatars.discourse-cdn.com/v4/letter/a/8dc957/32.png) [@ateg](https://tech-community.robotics.abb.com/u/ateg)\
**Post date:** [November 3, 2009, 1:50pm UTC](https://tech-community.robotics.abb.com/t/irc5-ethernet-ip-master-to-c-logix/3108/3 "2009-11-03T13:50:43Z")

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Hi,

The Rockwell ControlLogix PLC:s don’t have the functionallity needed to be able to be connected as a server (internal slave) from another client (master).

To be able to contact the EtherNet/IP internal slave in the IRC5 controller from a PLC it must be configured as a EN\_INTERNAL\_SLAVE and for example 8 byte in and 8 byte out.

In module proporties for the IRC5 internal slave in RSLogix specify the correct IP address, assembly instances (input: 100 with size: 4 and output: 112 with size 4 and Configuration: 1 with size 0).

Use the Comm Format (communication format): Data - INT

Download and go online and the PLC should have established a connection to the IRC5 internal slave.

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**Author:** ![ellebt](https://avatars.discourse-cdn.com/v4/letter/e/ecb155/32.png) [@ellebt](https://tech-community.robotics.abb.com/u/ellebt)\
**Post date:** [December 29, 2010, 3:47am UTC](https://tech-community.robotics.abb.com/t/irc5-ethernet-ip-master-to-c-logix/3108/4 "2010-12-29T03:47:32Z")

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Thank You for the Info (Worked Great)

Just wondering how did you figure out the settings

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**Author:** ![ateg](https://avatars.discourse-cdn.com/v4/letter/a/8dc957/32.png) [@ateg](https://tech-community.robotics.abb.com/u/ateg)\
**Post date:** [January 10, 2011, 10:31am UTC](https://tech-community.robotics.abb.com/t/irc5-ethernet-ip-master-to-c-logix/3108/5 "2011-01-10T10:31:45Z")

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All these parameters can be found in the EDS file.