Local Communication Issues With Ethernet cDAQ Linking to Host PC

Updated Apr 23, 2018

Reported In


  • cDAQ-9181
  • cDAQ-9184
  • cDAQ-9191
  • cDAQ-9188

Issue Details

I cannot get my Ethernet CompactDAQ (cDAQ) chassis like the cDAQ-9181, cDAQ-9184, cDAQ-9188, cDAQ-9188XT or cDAQ-9191 to communicate with my host machine over link local. 


APIPA is an alternative to DHCP and is used to request and retrieve an IP address for a host. When it is enabled, the operating system allows unique IP addresses to be assigned to each station on a small LAN. This may or may not resolve your issue. 

There is a setting you can add to your registry that allows you to control your APIPA on a Windows machine. Before editing the registry, you may want to get permission from your IT department to create this setting. 
  1. From the Windows Start menu, choose Run, and then type regedit to open the Registry Editor.
  2. Navigate to the key KEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters.
  3. Expand the Edit menu and select New DWORD value.
  4. Name the value IPAutoconfigurationEnabled and enter a value of 1 to allow your computer to obtain a link local IP address automatically.