Communication between Allen Bradley PLC's (Any) and Computer without RSLinx to get unsolicited p

[vivek.n.shah@disney.com 0]

I was searching whether is there any way by which we can get unsolicited messages/packets from Allen Bradley PLC's without using RSLinx software. I communicate to PLC from Windows 7 64 bit OS. I have connected Ethernet/IP and it works well with RSLinx but I want to eliminate RSLinx and directly establish connection and fetch data as an input to my custom application. Is it possible? Please help Thanks in advance

[Ken Roach 194]

What is your reason for wanting to eliminate the RSLinx installation ? There are a handful of other OPC servers that have Unsolicited functionality; KepServer is the best known among them. http://www.kepware.com/spec-sheets/allen-bradley-controllogix-unsolicited.asp You could also go with an I/O style connection instead of unsolicited messaging, and base your software layer on the open-source adapter project: https://github.com/EIPStackGroup/OpENer Or use a third-party stack like that from Real Time Automation: http://www.rtaautomation.com/software-solutions/ethernetip-server-server/ Writing your own EtherNet/IP stack would be far, far down the list of preferred methods.

[Morne 0]

Hi Ken, do you know where I might find a tutorial on how to setup the unsolicited messages on the Kepware side? 

[habadeer 0]

I'm not sure about the unsolicited part, but there are plenty of other solicited (or polling) software that can be used.  When I am looking to do something small without incurring much (or any) cost, I will use pylogix.  This is a python based project that provides functions for communicating with AB PLCs over EthernetIP.  Very, Very simple to use.

See: https://github.com/dmroeder/pylogix

Edited 18 Aug 2021 by habadeer

[pturmel 157]

On 6/29/2015 at 6:36 PM, vivek.n.shah@disney.com said:

directly establish connection and fetch data as an input to my custom application.

Yes.  You need to implement Rockwell's data access standard on top of an Ethernet/IP connection.  Start here:

https://literature.rockwellautomation.com/idc/groups/literature/documents/pm/1756-pm020_-en-p.pdf

Then look for a client protocol stack for your favorite language.