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Primer: S7-300 Programmable Controller, Quick Start
C79000-G7076-C500-01
Before downloading your configuration data to the CPU of your S7-300,
perform a memory reset of the CPU to make sure that it does not contain any
‘old’ blocks.
Please note that a memory
reset deletes all the user data
in the CPU!
The table below shows you step-by-step how to perform a memory reset on
the CPU of your S7-300:
Step Procedure Result
1.
Click on the menu command File → Open →
Accessible Nodes in the SIMATIC Manager and
select the MPI address of your CPU in the
subsequent dialog box to establish an online
connection.
An online connection to your CPU now exists.
2.
Display the current operating mode of your CPU
with the menu command PLC → Operating
Mode...
The current mode of your CPU is displayed.
3.
Set the CPU to STOP by clicking on the ‘Stop’
button and confirm with “OK”. Exit the dialog
box by clicking on “Close”.
The CPU goes to STOP.
4.
Call the ‘Memory Reset’ function with the menu
command PLC → Clear/Reset... and confirm.
The keyswitch on your CPU must be in the
position “RUN-P” or “STOP”.
The following process now takes place in the
CPU:
S The CPU is reset and the entire user program
is deleted.
S The system parameters and the CPU and
module parameters are reset to the default
settings.
S The CPU breaks off all existing connections.
Introduction
How Do You
Proceed?
Configuring and Assigning Parameters to Your S7-300
First Perform a Memory Reset of Your CPU!
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