Firmware/BIOS description SIMATIC IPC BX-39A, IPC PX-39A, IPC PX-39A PRO 
40  Operating Instructions, 01/2023, A5E51110693-AA 
Firmware/BIOS updates are regularly available for your device. You can download these from 
the Internet. 
Changing firmware settings 
The firmware settings are preset for working with the included software. You should only 
change the default firmware settings if technical changes to your device require other 
settings. 
 
Malfunctions can occur with running software CPU 
If a PC firmware/BIOS update is being performed while a SIMATIC Software Controller, such 
as a SIMATIC WinAC, is running, the software CPU can malfunction, resulting in 
communication interruptions or failures, among other things. Other actions that put a 
heavy load on the PC hardware, for example, running hardware tests such as benchmarks, 
can result in malfunctions of the software CPU. 
Do not run a firmware/BIOS update or other actions that would put a heavy load on the 
hardware during operation of a software CPU. 
Switch the software CPU to "STOP" before you run a firmware/BIOS update or perform other 
Backing up firmware settings before updating the firmware 
 
Risk of irretrievable loss of data 
All firmware settings are reset to default values after a firmware/BIOS update. 
This can put the system in an undefined state. The consequence may be damage to the 
device or system. 
•  Make sure that any settings that have been changed as compared to the delivery state 
are documented before you update your firmware.