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Chapter 3 Deployment of the CPU 821x
Example for the
automatic
allocation of
addresses
PAE
Peripheral area
rel. Addr.
0
Input byte 0
1
Input byte 1
2
Input byte 2
3
Input byte 3
.
.
.
127
Input byte 127
Input byte 0
128
.
.
.
135
Input byte 7
136
Input byte 8
137
Input byte 9
.
.
.
Input byte 1023
1023
Modifying allocated
addresses by
configuration
3-4
The following figure illustrates the automatic allocation of addresses:
Plug-in location:
1
.
.
.
. .
. .
.
.
. .
.
You may change the allocated addresses at any time by means of the
Siemens STEP
7 manager. In this way you may also change the addres-
ses of analog modules to the range covered by the process image (0...127)
and address digital modules above 127.
The following pages describe the required preparations and the procedure
for this type of configuration.
2
3
4
5
ADAM 8000 Manual CPU 821x – Rev 1.1
CPU ADAM 821x
6
Peripheral area
rel. Addr
0
Output byte 0
1
Output byte 1
2
Output byte 2
3
Output byte 3
.
.
.
.
.
.
Output byte 127
127
Output byte 0
128
.
. .
.
.
.
135
Output byte 7
136
Output byte 8
137
Output byte 9
.
. .
.
.
.
Output byte 1023
1023
PAA
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