Where did you guys find the plugin for EC500V5. I have the same problem. I did get a CD but the plugin does not work right. They changed the ARM processor to a different brand. I'm making a youtube video about it.
The DLL file that came with my CD is called CNCBOY.dll. It partially works with IP 192.168.4.10. I get axis count and serial number in plugin screen but no movement, input or output.