Configure DCOM for OPC DA Connections

this document will detail the steps needed to configure dcom access in windows 7 and windows 10 these settings are required for opc da (opc classic) connections between two pcs you will need to configure different settings for the pc with the opc server and the pc with the opc client step 1 set up the client pc to set up the client pc open control pane l and set the view by option to small icons select administrative tools open component services , then select console root > component services > computers > my computer right click my computer and open properties to open the popup window open the default properties tab and set the default authentication leve l to none open the com security tab and select edit limits… in the access permissions section to open the popup window allow local access and remote access for the anonymous logon group select ok on both popup windows to save your changes in control panel , open windows firewall in the left sidebar, select allow a program of feature through windows firewall select change settings and select both options (private and public) on the file and printer sharing line click ok to save your changes step 2 set up the server pc to set up the server pc open control panel and set the view by option to small icons select administrative tools open computer management , then select computer management (local) > system tools > local users and groups > users in the menu bar, select action > new user add a username, password, and select the options “user cannot change password” and “password never expires ” you may need to deselect “user must change password at next logon” to enable these options click create , then click close to finish creating the new user on the computer management window, select the user you just created, then select action > properties go to the member of tab, click add… to open the select groups popup window, then click advanced… to open another popup window click find now to populate the search results field, select the administrators group, then click ok click ok on the select groups popup window, then ok on the user properties window