[Cause]
PROFINET safety cannot be used for some reason. For example, the PROFINET board firmware version may not meet the required conditions, or the safety module slot number may differ from the number defined in the GSD file.
[Countermeasure]
Check system variable $PNIO_DIAG.$FW_VERSION to confirm the PROFINET firmware version. Also refer to the PROFINET I/O Function operator manual and check the GSD file supporting the two required firmware versions. Download the firmware required by PROFINET and check the GSD file in the configuration tool. Check the safety module slot number.