Siemens SIMATIC S5 - Page 137

Manual S5-115F STEP 5 Operations
1W
max. 127 W
OB, PB, SB Header
LPLZ incrementation sequence
User operations:
BE-operations
5W
5W
Figure 3-8. Structure of a Single-Segment OB, PB, SB (max. 261 words)
max. 127 W
max. 127 W
Header: OB, PB, SB
LPLZ incrementation sequence
User operations:
BE in last segment instead of BLD 255
User operations:
BLD 255 operation
LPLZ incrementation sequence
BLD 255 operation
5W
5W
1W
5W
1W
1W
Figure 3-9. Structure of a Multi-Segment OB, PB, SB (max. 4096 words)
Note
Only the last BLD 255 operation before the 128 word boundary need to be followed by
a sequence for incrementing the LPLZ.
EWA 4NEB 811 6149-02 3-41