In Screen Editor 1.05.84*1, software for DOP-A series, select Options => Network Setting => to enable eServer/eRemote.

In Screen Editor 2.00.18*2, software for DOP-B series, select Options => Network Setting => to enable eServer/eRemote.
*1: Screen Editor 1.05.84 is the latest version for DOP-A series. Please download the most updated version at Delta's website.
*2: Screen Editor 2.00.18 is the latest version for DOP-B series. Please download the most updated version at Delta's website.