How to load new firmware   
9.3 Downloading Siemens firmware 
  CP 343-1 ERPC 
68  Manual, 03/2010, C79000-G8976-C239-02 
9.3  Downloading Siemens firmware 
Requirements 
You download new firmware to a SIMATIC NET CP using the firmware loader shipped with 
STEP 7 / NCM S7. 
Requirements for downloading 
●  To download firmware, you require an Industrial Ethernet CP module in the PG/PC (for 
example, CP 1613) or a normal Ethernet module with the “Softnet" software package. 
●  The S7ONLINE interface must be set to the "ISO - Industrial Ethernet" protocol. It is not 
possible to download using TCP/IP (and therefore not to other networks). 
How to download new firmware 
You always start the download using the MAC address of the CP set in the factory! 
LED display of the download status  
The different combinations of the LEDs on the front panel indicate the download status: 
 
SF 
(red) 
BF 
(red) 
RUN 
(green) 
STOP 
(yellow) 
Download status of the CP 
   
Downloading firmware. 
   
Firmware was successfully downloaded. 
   
Firmware could not be downloaded. 
Legend - meaning of the symbols: 
 
Symbol 
   
 
     
Status  ON (steady light)  OFF  Flashing 
Restarting the CP 
After downloading the firmware, restart the S7 station with the CP by cycling power. 
What to do if a download is interrupted 
Disturbances or collisions on the network can lead to packets being lost. In such cases, this 
can lead to an interruption of the firmware download. The firmware loader then signals a 
timeout or negative response from the module being loaded. In this case, turn the station off 
and on again and repeat the download.