# Mapping a Virtual Station to a Virtual Fieldbus

Make sure that the fieldbus size is large enough to contain the Controller Fieldbus that you want to use. Configure these settings in the Size section.

To map a Virtual Station to a Virtual Fieldbus, the Virtual Station mapping mode must be set to Many-to-one.

When the Virtual Station mapping mode is changed an eventual existing Virtual Station mapping configuration is deleted. A deleted mapping can not be restored.

1. Select a controller in the Plant structure workspace.

2. Select the Fieldbus and SoftPLC tab then select the Overview sub-tab.

3. In the Virtual Station mapping configuration section, select a Controller Fieldbus configuration.

4. Enter offsets to/from the controller to plan the fieldbus distribution.

   The offset is graphically displayed in the Fieldbus Distribution section.

5. In the Mappings section, select Add...

6. Select a Virtual Station.

7. Select a Virtual Fieldbus.

8. Select Add.

9. Select Close.

The Fieldbus mapping is seen both in the Overview sub-tab and in the Virtual Station tab. Select the Virtual Station tab to verify the mapping in the Fieldbus Mapping section.