Cause : SW version comes when the firmware versions on the CU have different firmware release. The EPROMs on the CU have different software releases. The language EPROM is compared with the CU software as well as the MWH software with the CU software.

F049 fault in siemens master drive indicates a software version mismatch within the drive. This means that different components within the drive are running on incompatible software versions.

• Use uniform firmware.