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Drive plc, Appendix, Ram block – Lenze Global Drive PLC Developer Studio User Manual

Page 120: Driveplc de 6.0

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Drive PLC

Appendix

8−40

L

DrivePLC DE 6.0

Auto−increment access

The four data bytes are always read/written through "auto−increment access", i.e. the pointer to the
address in the selected RAM block is automatically incremented by four bytes after reading code
C0507 or writing code C0508:

0

Offset

C0505

auto-increment

(+4 bytes)

65532

4 bytes

4 bytes

4 bytes

4 bytes

RAM
block

4 bytes

0

Offset

C0505

auto-increment

(+4 bytes)

65532

4 bytes

4 bytes

4 bytes

4 bytes

4 bytes

0

Offset

C0505

auto-increment

(+4 bytes)

65532

4 bytes

4 bytes

4 bytes

4 bytes

4 bytes

1.

2.

3.

C0507

C0507

C0507

Fig. 8−2

Example: Reading successive double integer values from the RAM block through auto−increment access