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Appendix A. Troubleshooting
Appendix A.1. FAQ
Q:I cannot “ see” the “ FieldServer.7.16k” listed as an available data source?
A:When Configuring an OPC Client link to the FieldServer OPC, your OPC Client will be browsing for available Servers using the OPC Foundation supplied utility OPCENUM.EXE (Installed with the FST OPC Server for FieldServers)
1. If the Client & Server are on the same machine
∙Check that OPCENUM.EXE is running in the background, it is installed as a service & should start when the Client needs it
∙If you are running NT4 or Windows 2000 AND you Installed Explorer 6.x AND you get the following message on installation “IcatInformation interface not supported” OR you see this message “Incompatible Version of RPC Stub 0x80070725” then our recommendation is that you uninstall IE6. This is a known issue that needs to be resolved by Microsoft & the OPC foundation. This problem does not appear to be an issue on Windows XP
∙If you are still are not able to see the Server listed in your Client, your Client “should” allow you to manually type the ProgID. In some cases you may need to type the
CLSID
∙ ProgID “FieldServer”
∙CLSID
2.If the Client & Server are different machines
In this case the same issues apply as above with the following additions
∙Make sure that the networking is correctly setup, that you can see the Server machine in the network neighbourhood
∙OPCENUM.EXE needs to run on both machines, on the Server machine it needs to be running at startup which sometimes does not happen – check the services & set the startup mode of the OPCENUM service.
Q:My OPC Client is just giving me OPC data quality bad - Why ?
A:The first place to look is in the Configurator - select the Data Array containing the address you are looking at. Then press the “Stats” button
The following are some of the Symptoms to lookout for:
∙If the Timeout & retry counters are incrementing then the problem is with the communication to the FieldServer.
o Make sure that you can “Ping” the FS.
o Make sure that the Ethernet port on the FS is configured for SMT protocol
∙To the Right of the “Last Error Field” there is a Text field that is
oIf it Says “Bad DA name” it means this Data Array does not exist in the FS
check your FS configuration
oIf it Says “Bad DA offset” it means that you are attempting to poll more data than exists in this DA – shorten the length
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