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

6.5

Firmware update in RUN mode

Requirement
The size of the load memory on the master and reserve CPU is the same. Both Sync links
exist and are working.
Procedure for automatic firmware update
Initial situation: Both CPUs are in redundant operation.
1. Select one of the two CPUs using either SIMATIC Manager -> Project, or HW Config.
2. Select the "PLC > Update Firmware" menu command.
Alternative procedure for progressive firmware update
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 using the programming device
2. Select this CPU in HW Config or in SIMATIC Manager in your STEP 7 project.
3. Select the "PLC -> Update Firmware" menu command.
4. In SIMATIC Manager or HW Config, select the "PLC -> Operating Mode -> Switch to CPU
5. Repeat steps 1 to 3 for the other CPU.
6. Restart the CPU. The fault-tolerant system will return to redundant mode.
Both CPUs have updated firmware (operating system) and are in redundant mode.
Note
Only the third number of the firmware versions of the master and reserve CPU may differ by
1. You can only update to the newer version.
Example: From V6.0.0 to V6.0.1
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 121) also apply to a firmware update in RUN
S7-400H
System Manual, 03/2012, A5E00267695-11
Do not use the "Accessible nodes" menu command in SIMATIC Manager.
A wizard is started that can automatically update the firmware on both CPUs.
The "Update Firmware" dialog box opens. Select the firmware file from which the current
firmware will be downloaded to the selected CPU.
41x-H" and select the "with altered operating system" check box.
The fault-tolerant system switches the master/standby roles, after which the CPU will be
in RUN again.
Special functions of a CPU 41x-H
6.5 Firmware update in RUN mode
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