Data Storage Concept - Siemens SIMATIC S7-300 Manual

System overview The following figure gives you an overview of the data storage concept.
of data handling
CPU
Load memory RAM
User program, in-
cluding FCs
User DBx
Online data
Operating sys-
tem
MPI
Creation of the
user program
LAD/STL DB Editor
Editor
PG (STEP 7)
Fig. 1-3

Data storage concept

FM 354 Servo Drive Positioning Module
Module data
P bus
Diagnostic/
process inter-
rupt
K bus
Human-machine
interface
Parameterization,
testing and diag-
nostics
Parameter-
ize FM 354
Product Summary
FM 354
Module data
Diagnostic data
DBx pa-
rame-
...
terization
data
e.g.:
Machine data
Increments
Tool offset data
OP
Traversing programs
Status messages
DBx pa-
rame-
terization
data
1-7