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Hi Tuan,
It work well with me. Lastest Rslogix 5000 Version 19 is 19.1, version 20 is 20.04.
After you add new module, You can change firmware 2.1 to firmware 2.2.
Or you can message to me.
Hi Tuan,
This problem occur because you RSlogix 19 and 20 didn't have Add-On profile for 1769-ASCII version 2.002.
You can download leastest Add-On profile in Rockwell Automation website(https://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?crumb=112) or contact with local distributor( Servo Dynamics Engineering) for support download them.