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80 Siemens Simatic S7 Driver Online Help

Modifying the Process Database

Once your 7.x driver configuration is imported and communicating with the process

hardware, you are ready to modify your process database. Modifying the process

database is required because the driver acronym is SI7, not S_7.

To modify the database:

[1] Export your process database. For instructions on exporting a process

database, refer to your Database Manager documentation.

[2] Edit the export file with a text editor. Change all references of S_7 to SI7.

[3] Save the changes you’ve made and import the file into Database Manager to

recreate the process database.

When you import the process database, any invalid database blocks are recorded in

the error file IMPORT.ERR. Examine this file to ensure all your database blocks

imported successfully.

Depending on your configuration you may receive errors because the SI7 driver does

not allow digital tags to access datablocks with a data type other than BYTE. If you

have such a configuration, you need to revisit your driver configuration and modify

any datablocks that are misconfigured.

However, before you modify your driver configuration, examine your process

database for analog blocks that access any of the datablocks you plan to change. If

you have these types of analog blocks, set the Hardware Options of the analog blocks

so that they receive the correct value.

For example, suppose you have a datablock, Datablock1, configured as an INT. The

database blocks AI1 and DI1 access it. DI1 accesses M0:8 and AI1 access M0. To

configure the driver and the database correctly for this object:

[1] Change the data type of Datablock1 to BYTE.

[2] Set the Hardware Option of AI1 to INT.

[3] Change the address of DI1 from M0:8 to M1:0.

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Siemens SIMATIC NET Spécifications Page 90