Siemens SITRANS WM300 MFA Operating Instructions Manual page 51

Note
When the non-contact tachometer and the differential speed functions enabled, the display
alternates between the over/under speed alarm and non-contact tachometer screens.
SITRANS WM300 MFA
Operating Instructions, 08/2018, A5E45090709-AA
Tachometer function enabled differential speed enabled
Parameter assignment
6.7 Differential speed detection
51