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3 API functions

20 

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

DI,DO 4x 4 bits

(1byte)

DI,DO 8x 8 bits

(1byte)

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 c

arried out, the

following results:

Abb. 4 Example constellation

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 31 32

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Lenze 3241C Bedienungsanleitung Seite 22