Siemens SIMATIC STEP 7 V5.2 Getting Started page 65

7.2 Downloading the Program to the Programmable Controller
You must have already established an online connextion in order tp download the
program...
................................................................................................................
Applying Voltage
Resetting the CPU and Switching it to RUN
Downloading the Program to the CPU
STEP 7 Getting Started
A5E00171228-01
Downloading and Debugging the Program
A memory reset deletes
all the data on the CPU.
The CPU is then in the
initial state.
Switch on the power supply using the
ON/OFF switch. The diode "DC 5V"
will light up on the CPU.
Turn the operating mode switch to the
STOP position (if not already in
STOP). The red "STOP" LED will light
up.
Turn the operating mode switch to the
MRES position and hold it there for at
least 3 seconds until the red "STOP"
LED starts flashing slowly.
Release the switch and, after a
maximum of 3 seconds, turn it to the
MRES position again. When the
"STOP" LED flashes quickly, the CPU
has been reset.
If the "STOP" LED does not start
flashing quickly, repeat the procedure.
Now turn the operating mode switch to
"STOP" again to download the
program.
7-3