BECKHOFF BC3150 - Manual (Page 62)

Safety Instructions
60 Fieldbus Components
Local process image in the TwinCAT configuration
The TwinCAT configuration (TwinCAT CONFIG) enables free mapping between PROFIBUS / K-Bus / PLC variables.
Variables can be linked independent of their address via the System Manager.
In the TwinCAT configuration, all Bus Terminals have fixed addresses. If a Bus Terminal is inserted, the whole
address range may be shifted. Many data are unnecessary and take up valuable address memory space. The
TwinCAT configuration rectifies this disadvantage. Allocated variables can be linked freely with a Bus Terminal.
Parameterization is carried out in the System Manager, and the configuration is then transferred to the BX (see
TwinCAT configuration).