The command library v11 creates two standard libraries in step 7 microwin uss protokollbibliothek the advanced uss protokol library for direct control of siemens micromaster frequency convreter mm3 mm4 and sinamics communication with the drives takes place through the uss protocol which is integrated in the micromasters as standard at the same time current status values are communicated from the drive to the controller a profibus cable is all that is required to wire up the drives and