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.
Values received after the update of the firmware are retained
Once the CPU memory has been reset, the following values are retained:
● The parameters of the MPI interface (MPI address and highest MPI address).
● The IP address of the CPU
● The device name (NameOfStation)
● The subnet mask
● The static SNMP parameters
Updating a CPU with an operating system update card
You can find information on this at the following Internet address:
http://www.siemens.automation.com/service (
http://support.automation.siemens.com/WW/
)
Ensuring Availability
3.3 Hardware update
Service support and diagnostics (V8.0)
Service Manual, 03/2012, A5E02779775-02
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