Troubleshooting Communication Problems (DSC Module)

LabVIEW Datalogging and Supervisory Control Module 8.2 Help
August 2006

NI Part Number:
370246E-01

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If you are having communication problems across the network, review the following guidelines.

Make sure each network computer can access the other computers across the network.
Because the protocol used for network communication between network Shared Variable Engines is based on TCP/IP, make sure each computer has TCP/IP configured correctly on it.
Each computer must have a unique IP address and a host name assigned to it. You can use TCP/IP utilities such as ping (all operating systems) and nslookup (only 2000/XP) to verify the address and the host name.

Note Execute ping /? from a command prompt to access ping command help. Execute nslookup <Enter>, then ? at the prompt to access nslookup help.

If network computers are separated by a firewall, you will have to make some adjustments. For more information about networking across firewalls, refer to the NI Developer Zone at ni.com/zone.
Use the National Instruments Shared Variable Monitor to monitor communication and determine whether data is accessible via the NI Publish-Subscribe Protocol (NI-PSP) or Logos.