How To Perform A Firmware Update For The H-Cpu (As Of V4.5) - Siemens PCS 7 Service Manual

Ensuring Availability
3.3 Hardware update
3.3.3.2

How to perform a firmware update for the H-CPU (as of V4.5)

The firmware version can be changed using the online functionality as of firmware version
V4.5.x.
● Firmware update of an H system in RUN
● It is not possible to downgrade in RUN
Performing the firmware update of a H-CPU in RUN as of V4.5
Generally, a firmware version can only be upgraded to the next higher firmware version when
a firmware update in RUN is performed. It is not possible to downgrade in RUN. You should
also read the information provided in the version-specific description.
To update the firmware of the CPU of an H system in RUN, follow these steps:
1. Make sure that the H system is in the redundant state without errors.
2. Select one of the CPUs in HW Config or SIMATIC Manager.
3. Select the menu command PLC > Update Firmware.
4. Select the firmware file to be loaded to the CPUs.
5. After confirmation with the "Run" button, a dialog with the following content opens:
6. You can activate "Automatically continue" in the next dialog.
7. The firmware update is finished on both CPUs.
Downgrading an H-CPU
If a CPU in your S7-400H, fails, order a new CPU with the same number. This comes with the
latest firmware version. This firmware can be higher than the predecessor CPU. In this case,
the new CPU must be set to the older firmware version.
1. Insert the new CPU into your automation system.
2. Select this CPU in HW Config or SIMATIC Manager.
3. Select the menu command PLC > Update Firmware.
4. Select the firmware file that corresponds to the version of the predecessor CPU.
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The "Update Firmware" dialog box opens. Both CPUs are displayed with order number,
current firmware version, name and mounting position.
"Caution ... all CPU data will be deleted. Do you want to continue?".
Click "Yes".
Click "Next". The firmware update starts in the "Run" state.
Check the operating mode and the active firmware version of both CPUs.
Note
Do not connect the fiber-optic cable to the CPU of an H system.
The "Update Firmware" dialog box opens.
Service support and diagnostics (V8.0)
Service Manual, 03/2012, A5E02779775-02