Currency Type for Controlling Area:

The controlling area currency type determines which currency is allowed as controlling area currency and whether the CO area currency can differ from the currency of the assigned company codes. CO area currency is either set by the user or derived from other organizational units.

1. The assignment control indicator, together with the currency type, determines the controlling area currency and whether to activate or deactivate the other company code currency indicator.
2.  You can select currency type 10 only if all company codes assigned to the controlling area use the same currency.
3. If you select 1 as the assignment control, the R/3 System uses the default setting 10 as the currency type.
4. If you select currency type 40 or 50, the company codes must either be in the same country, or the countries must use the same index-based currency or hard currency.
5. If you select currency type 60, the company codes must belong to the same company, or the companies must use the same currency.
6. If you select currency type 20, specify the currency. With currency types 40, 50, and 60, specify the currency only as long as no company codes have been assigned. If company codes have been assigned, the R/3 System defaults the currency automatically