Lenze 3241C - Manual (Page 22)

3 API functions
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3.4.8 Memory requirements for process data
The memory requirements for process data can be calculated via the currently
available modules:
Terminal Process image Configurable Bytes @64 nodes
DI,DO 2x 2 bits
Always 1byte per terminal is
transmitted
64
DI,DO 4x 4 bits
(1byte)
64
DI,DO 8x 8 bits
(1byte)
64
AI,AO 2x12bits 4 bytes (2x16bits)  256
AI,AO 4x12bits 8 bytes (4x16bits)  512
Reading and writing are different with the regard to the maximum amount of data.
During reading, according to the table there is a maximum of 1280 bytes; during
writing a maximum of 512 bytes.
3.4.9 Example constellation
The example constellation of a randomly selected combination of I/O compound
modules is used as an illustration. After the address location has been carried out, the
following results:
Abb. 4 Example constellation