Configure Symbol File

Symbol includes the items (variables) which exchanges with PLC, this is needed for OPC communication. After build the project, two symbol files will be generated under the project (.pro) folder. One is .sdb, another is .sym.

File .sdb is a binary file and is needed by OPC server indeed. File .sym has the same content but in text, which can be understood by human. It can be used to check if it is generated correctly.

Note

Please refer to REF5 Online Help of PS501 for how to configure a symbol file Essential Documents.

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Select the Symbol configuration in Menu Project ‣ Options .

Checkbox Dump symbol entries must be enabled.

Select Configure symbol file.

Note

Sometimes the symbol file looks different than really configured, e.g. more symbols than expected.

In such case please follow the steps to create a clean symbol file.

  1. Go to Project ‣ Options Symbol configuration. Select Configure symbol file.

  2. Uncheck all the options in Symbol file configuration and confirm it twice with OK.

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  3. Go to Project ‣ Options Symbol configuration. Select Configure symbol file again.

    First choose the variables which should be communicated as symbol:

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  4. Then check the following options:

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  5. Confirm it twice with OK again. You can rebuild the project.