I want to do communication between a v1040 and a slc5/4(os401) with df1. I try the parameter that I find in the exemple, the only difference is that I dont use a compact logic cpu but a slc500. The write function is working but the read function doesnt work at all. The communication is very unstable, I lost a lot of packet. I dont know if the problem is that my os in the slc500 is to old or if I did a bad configuration but I have a lot of problem. The other problem is that when I change the chanel configuration in the slc500 like it was in the exemple, after the download, I am not able to communicate anymore with the slc500 using rs-link. I want to know I it is possible to communicate in df1 between these two plc and if someone have the parameter that I have to put in rs-link, slc500 and v1040?