Firmware Update In Run Mode - Siemens SIMATIC S7-400H System Manual

6.2

Firmware update in RUN mode

Requirement
The size of the load memory on the master and standby CPU is the same. Both sync links
exist and are working.
Procedure
Follow the steps below to update the firmware of the CPUs of an H system in RUN:
1. Set one of the CPUs to STOP.
2. Select this CPU in HW Config.
3. Select the "PLC > Update Firmware" menu command.
4. In the SIMATIC Manager or in HW Config, select the "PLC > Switch to CPU 41xH" and
5. Repeat steps 1 to 3 for the other CPU.
6. Link up and update the CPUs.
Both CPUs have updated firmware (operating system) and are in redundant mode.
Note
The third number of the firmware versions of the master and standby CPU may only differ
by 1. You can only update to the newer version.
Example: From V4.5.0 to V4.5.1
Please take note of any information posted in the firmware download area.
The constraints described in section System and operating states of the S7-400H (Page 79)
also apply to a firmware update in RUN
S7-400H
System Manual, 09/2007, A5E00267695-03
The "Update Firmware" dialog box opens. Select the firmware file from which the current
firmware will be loaded to the selected CPU.
select the "with altered operating system" check box.
Special functions of a CPU 41x-H
6.2 Firmware update in RUN mode
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