Technical Reference Manual - InduSoft

Communication with Other Devices
You must actually create the class with enough members to accomodate the elements of the
array item on the server. If there are not enough members, then elements will be lost. Class
members cannot be created during runtime.
Scenario 4: The project tag is both a class and an array
If the class member ends with a number, then it is handled the same as in Scenario 3 above,
regardless of the fact that the tag is also an array.
If the class member does not end with a number, then it is handled the same as in Scenario 1
above.
Examples of tags that are both classes and arrays
When Tag Name is configured
as…
…the values of the array element are written to the following members:
MyArrayClass.Member MyArrayClass[0].Member, MyArrayClass[1].Member,
MyArrayClass[2].Member
MyArrayClass[3].Member MyArrayClass[3].Member, MyArrayClass[4].Member,
MyArrayClass[5].Member
MyArrayClass[3].Member1 MyArrayClass[3].Member1, MyArrayClass[3].Member2,
MyArrayClass[3].Member3
MyArrayClass[3].Member3 MyArrayClass[3].Member3, MyArrayClass[3].Member4,
MyArrayClass[3].Member5
MyArrayClass[3].Member001 MyArrayClass[3].Member001, MyArrayClass[3].Member002,
MyArrayClass[3].Member003
Note: This functionality is not supported in projects running on Windows Mobile or Windows
Embedded Compact.
OPC Troubleshooting
When you are using OPC and have problems establishing communication, you should first verify the
messages in the LogWin.
If you are running the project on a Windows Embedded target system, there are two ways to check the log:
1. Remote LogWin
2. Local Log
For information about using these logs, please refer to Using the LogWin task.
If you find error messages in the log, look them up in this manual/help system, and follow the documented
steps for solving the problems. (Use + F to find them in the manual; use the Index to find them in the
context sensitive help system.)
If you feel that you need to contact your distributor for technical support, make sure that you provide them
with the following information:
1. Log file
2. Software vendor and product name of the OPC Server/Client that you are using
3. If possible, a copy or an evaluation version of the OPC Server for testing purposes
4. The contact information for your OPC Server/Client technical support
Three possible errors and their resolutions are listed below…
Security
Error Code: 0x80070005 or -2147024891
Reason for error: When the OPC Client tries to connect to the OPC Server, the DCOM layer usually requires
authentication. The computer that is running the OPC Server needs to recognize the user logged on to the
OPC Client computer, and such a user needs to have privileges to access the OPC Server.
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