If you need to replace an NXT-MSC (Mercury-Powered) 2-door or 4-door controller in the Doors.NET software, such as if it has been damaged, please use the following procedure to minimize the amount of system down-time:

1. Right-click the old controller in the hardware tree (Setup >> Hardware Setup >> All) choose Disconnect.
2. The controller will immediately go offline.
3. Or simply down-power the old controller.
4. In the controller properties locate the controller's MAC address (ensure that Advanced View is enabled). The MAC address begins 00-14-34.
   
   
   
   

5. Change the last 3 segments of the MAC address (entering the new/replacement controller's MAC address).
   
   
   
   

6. Perform a scan in Doors.NET to detect the new controller.

7. The replacement controller will be assigned a new DHCP IP address.

8. Make a note of this IP address.

9. Return to the hardware tree and select the controller to display the controller properties.

10. Enter the new IP address into the controller properties.
    
    
    
    

11. Save the controller settings and the replacement controller will come online.

12. Right-click the controller in the hardware tree. Choose Reset >> Memory.
    
    
    
    

13. The controller will be reset and a total update will automatically be sent to the controller.