BECKHOFF BC2000 - Manual (Page 25)

Settings in TwinCAT PLC
BC2000 24
Coupler Options
The maximum size of the program memory and of the data memory can be
set in PLC Control under „Projects“, „Options“, „Coupler“. In the „small
memory model“, a variable size for the data and program memories is
possible. The maximum memory size is 64 kbyte. In the „large memory
model“ a maximum of 96 kbyte program memory and 64 kbyte data
memory are the upper limits.
It should be noted that in the „large memory model“ the EEPROM is also
used.