Prerequisites:

• On-line updating of the firmware is possible with STEP 7 V5.3 and higher.
• The module to be updated must be located in a station that can be reached on-line.
• An MMC must be inserted in the module.
• The files with the latest firmware version must be available on the file system of your programming device (PG or PC).
  One folder may only contain the files for one firmware version.

Durchführen eines Firmware-Updates:

1. Start STEP 7 and switch to HW-Config.
2. Open the station with the CPU to be updated.
3. Earmark the CPU.
4. Select the menu option "Target system > Firmware update". The menu option can only be activated if the selected CPU supports the function "Firmware update".
5. In the opened menu option "Firmware update" use the "Search" button to select the path to the firmware update files (*.UPD).
6. When you have selected a file, you will be told in the lower part of the "Firmware update" dialog field for which module and from which firmware version onwards the file is suitable.
7. Click the "Execute" button. STEP 7 will check whether the selected file can be interpreted by the module and - if the result is positive - load the file to the CPU. If the operating mode of the CPU has to be changed for this purpose you will be asked to perform this action. The CPU will then perform the firmware update on its own.
8. Check with STEP 7 (read CPU diagnostic buffer) whether the CPU successfully starts up with the new firmware.