A CU320-2 Control Unit can perform the communication, openloop and closed-loop control functions for several power units. The computing capacity requirement increases in proportion to the number of power units and system components and in relation to the dynamic response required. The computing capacity requirement and utilization of the CU320-2 Control Unit can be calculated with the SIZER for Siemens Drives engineering tool. The full computing capacity of the CU320-2 Control Unit is only available on systems with performance expansion. For the CU320-2 Control Unit, the performance expansion is necessary from the 4th axis.

In addition to the firmware, the CompactFlash card also contains licensing codes that are required to enable firmware options (currently, the performance expansion and the Safety Integrated Extended Functions). The Safety Integrated Extended Functions must be ordered for each axis via order codes (F..) in addition to the order number.

The firmware options can also be enabled on-site, for example, if the performance expansions required are not known at the time of ordering or the Safety Integrated Extended functions are to be enabled retrospectively. You will need the serial number of the CompactFlash card and the order number of the firmware option to be enabled. With this information, you can purchase the associated license code from a license database and enable the firmware option. The license code is only valid for the CompactFlash card declared and cannot be transferred to other CompactFlash cards.