Thank you for your answer.
Well, I have been doing test with the Ethernet toolkit, specially with Get Attribute Single.vi as show in the image but I have only gotten information with class = 1, instance = 1 and attribute = 1 and the information that I got was model information. I want to read data from my inputs slots connected to Point I/O and I want to write data to my outputs slots connected to Point I/O but I do not how to configure classes, instances and attributes for every slot.
I think this configuration is made by point I/O but I am not sure.
If anybody can help me, please.