I did it as you said. but unfortunately, the same message came.
I can control PLC modes. but no upload or download.
I don't have the original cable for peripheral port and no time to wait for it to come from outside.
I uploaded the files including the communication protocol file between PLLC and HP25 Parker servo drive and Eurotherm DC drive.
Please check if any settings to be done to make connection successful.
I have an issue with servo data for positioning