Siemens SIMATIC S5 CP 521 Manual page 146

CP 521
CPU CP 521
B0
H
Data Block
transf. number
5X 01
H H
Coord. Coord.
info. byte
. . .
CPU CP 521
B0
H
Data Block
tansf. number
5X 01
H H
Coord. Coord.
info. byte
...
after the data have been sent to the peripheral device, ...
5X 00
H H
Coord. Coord.
info. byte
reset
Figure 7-3. Sequence Schematic for Sending Data (Continued)
Steps to are explained more fully in the following.
GWA 4NEB 812 6030-02b
02 nn nn
H H H
00 02 nn
H H H
Data Block Number
valid number of
messages
nr nn nn
H H H
00 nr nn
H H H
Data Block Number
valid number of
messages
00 xx nn
H H H
Data Irrele- Number
valid vant of
messages
ASCII Mode
nn nn nn
H H H
Data
CPU CP 521
xx xx xx
H H H
Irrelevant
nn nn nn
H H H
Data
CPU CP 521
xx xx xx
H H H
Irrelevant
CPU CP 521
xx xx xx
H H H
Irrelevant
nn
H
nn
H
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