Siemens SIMATIC S7-1500/ET 200MP System Manual page 315

Maintenance
14.5 Firmware update
Before installing the firmware update, make sure that the modules are not being used.
Figure 14-14 Selecting the software downloads
Additional requirement for fail-safe modules
Check the firmware version for F-approval
When using a new firmware version, always check that the version is approved for use in
the respective module.
The attachments of the certificate
(https://support.automation.siemens.com/WW/view/en/49368678/134200) for
SIMATIC Safety specify which firmware version is approved.
Special feature when updating the firmware of CPUs with Linux-based operating system
For the 1518(F)-4 PN/DP MFP CPUs, also observe the procedure for firmware updates from
the CPU 1518-4 PN/DP MFP
(https://support.industry.siemens.com/cs/ww/en/view/109749061) manual.
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WARNING
Automation system
System Manual, 01/2023, A5E03461182-AK