S7-1500: Setup Of Optimized Blocks - Siemens S7-1200 Programming Manualline

2 S7-1200/1500 Innovations
2.6 Optimized blocks
2.6.2

S7-1500: Setup of optimized blocks

Figure 2-6: Optimized block of S7-1500
Standard block
Standard
0
X1
1
B
2
X2
y
3
t
4
e
s
5
6
X4
7
8
9
Figure 2-7: Memory space assignment in optimized blocks
4 Byte are always read at once
Optimized
0
16
32
B
48
y
t
64
e
80
s
96
102
128
144
1. Structures are stored separately and can thus be copied as one block.
2. Retentive data are stored in a separate area and can be copied as one block.
In the event of a power failure, these data are stored CPU-internally. "MRES"
resets these data to the start values stored in the load memory.
Properties
No data gaps are formed since larger tags are located at the beginning of the
block and smaller ones at the end.
Fast access due the best possible storage in the processor (All tags are stored
in a way so that the processor of the S7-1500 can directly read or write all tags
with just one machine command).
Boolean tags are stored as byte for faster access. The controller therefore
does not have to mask the access.
Programming Guideline for S7-1200/1500
V1.2, Entry ID: 81318674
Bits
0 1 2 3 4 5 6
B1
X3
W1
W2
DW DW
W W W B B B B X X X
Reserve
DW DW
W B X X
Optimized block
Optimized
0 1
7
B
y
t
e
s
X1
X2
X3
X4
1
W B W W
DW W W
Reserve
Bits
2 3 4 5 6 7
W1
W2
B1
Reserve
2
11