So we have a redundant station 414-4H, one of the CPUs needed to be replaced, but the new one has a lower firmware version than the previous one (the new CPU is 4.5.3 and the previous is 4.5.5).

Now we need to update the firmware version of the new CPU before plugging the fiber cords, and without stopping the running CPU since the process is critical.

We want to do it with simatic manager, the CPU is equipped with RAM.

How could this be done?

Thanks

Hello,

Perhaps the following topic might help:

Download Operating System Updates V4.5H CPU412-3H / CPU414-4H / CPU414-4H PG / CPU417-4H

Description FW update firmware version V4.5.x

Updating firmware in RUN is possible as of this firmware version. An update is only possible from one version to the next, for example, from V4.5.5 to V4.5.6