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Configuring
Fig. 4-4
4-10
SIMATIC S7-CPU
(SL program)
Send
L
1.234568e+038
T
PAD 512
L
2.000000e+000
T
PAD 516
L
1234
T
PAW 520
L
12345678
T
PAD 524
L
B#16#80
T
PAB 528
L
5678
T
PAW 530
Receive
L
PEB 512
T
MB 20
B#16#FF
L
PED 516
T
MD 22
1.23 e+038
L
PEW 520
T
MW 26
3456
L
PED 524
T
MD 28
DW#16#12345678
Data transfer with peripheral accesses (I/O accesses)
P-bus
FM 458
(CFC program)
memory
of the FM 458
Receive
Receive function blocks (read)
memory
(128 bytes)
S7RD
0:
1:
0
OFF
2:
3:
S7RD
4:
5:
1
OFF
6:
7:
S7RD_I
8:
9:
4
OFF
10:
not used!
11:
S7RD_D
12:
13:
3
OFF Y DI
14:
15:
S7RD_B
16:
17:
not used!
16
OFF Q BO
18:
19:
S7RD_I
20:
....
....
9
OFF
127:
Send memory
Send function blocks (write)
(128 bytes)
0:
S7WR_B
1:
2:
not used!
1
BO I
3:
0
OFF
4:
5:
S7WR
6:
7:
1.23e+38
R X
8:
1
OFF
9:
10:
not used!
S7WR_I
11:
12:
3456
I
X
13:
4
OFF
14:
15:
S7WR_D
16:
17:
DI X
....
16#12345678
3
OFF
....
127:
Application Module FM 458 - User Manual
6DD1904-0AE0
HW Config
1.234568e+38
Y R
2.0
Y R
Y I
1234
16#12345678
1
5678
Y I
Edition 12.2001
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