Requirements
● STEP 7 V5.3 or higher is installed on the programming device or PC.
● The update file for the firmware update is available on the programming device / PC.
● The CPU, whose firmware is to be updated, must be accessible online, for example, via
PROFIBUS, MPI or Industrial Ethernet. The files containing the latest version of the
firmware are available in the file system of your programming device or PC. A folder may
only contain the files for one firmware version.
Note
For CPUs with a PROFINET interface, you can update the firmware via Industrial Ethernet
on the PROFINET interface. Updating via Industrial Ethernet is significantly faster than MPI
or DP (depending on the configured baud rate).
You can update the firmware of the other CPUs via Industrial Ethernet, if the CPU is
connected to Industrial Ethernet via a CP.
Procedure in HW Config
To update the firmware of a CPU, proceed as follows:
1. Open the station with the CPU to be updated in HW Config.
2. Select the CPU.
3. Select the menu command PLC > Update Firmware.
4. Select the path to the firmware update files (CPU_HD.UPD) by clicking the "Browse" button
in "Update Firmware" dialog.
Once you have selected a file, information about which modules and which firmware
versions are suited for the file is displayed in the lower fields of "Update Firmware" dialog.
5. Click "Run".
STEP 7 checks whether the selected file can be interpreted by the CPU and loads the file
to the CPU if the result is positive. If the operating state of the CPU must be changed to do
this, you are prompted by dialogs to take action.
Procedure in SIMATIC Manager
The procedure corresponds to the one in HW Config; the menu command here is also "PLC
> Update Firmware". However, STEP 7 only checks if the module supports the function at the
time it is executed.
Note
Protecting the update process
There a digital signature, which is checked during the update of the CPU to protect the firmware
update. If an error is detected, the old firmware remains active and new firmware is discarded.
Ensuring Availability
3.3 Hardware update
Service Support and Diagnostics (V8.2)
Service Manual, 03/2016, A5E36200111-AA
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