Siemens SIMATIC FM 453, Manual

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5-31
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
5.5 Storing the Parameter Data in SDB
w
1 000
The FM 453 stores its parameter data internally.
In order to ensure that the parameter data are available if there is a fault on
the FM 453 and no programming device/PC is at hand, the data can be stored
in a system data block in the CPU (SDB
w
1 000
)
. The CPU transfers the
data stored in SDB
w
1 000 to the FM 453 on each new start.
If the FM 453 has no machine data or the internal time stamp (time of cre-
ation) is invalid, the data are transferred from SDB
w
1 000 to the FM 453
and saved there.
You must ensure that the parameter data in SDB
w
1 000 always match
the parameter data on the FM 453 when start-up is complete.
Note
SDB
w
1 000 should not be created until start-up is finished.
If you need to modify the data subsequently, you should generate
SDB
w
1 000 again and load it into the CPU. You can delete the previous
SDB before you load the new one, however the new SDB automatically over-
writes the old one when it is generated. The old SDB and the new SDB do
not have to be allocated the same number.
Prerequisite: Online connection with the FM 453
Select menu File
"
Create SDB
If no DB-MD exists on the FM 453
→
Abort
No
No associated SDB
exists
SDB is created and stored in the S7 project in
CPU\S7-Program\Blocks\System data
An associated SDB
w
1 000
exists for the FM 453 in the
S7 project.
Yes
Abort
Overwrite this SDB?
Yes
No
Fig. 5-9 Creating SDB
w
1 000
Overview
Creating the SDB
Defining Parameters of the FM 453