Siemens SINAMICS S150 NEMA Operating Instructions Manual page 675

9.5.3 Blocking protection
Description
The "Motor blocked" fault is only triggered when the speed of the drive is below the
adjustable speed threshold in p2175. With vector control, it must also be ensured that the
speed controller is at the limit. With V/f control, the current limit must already have been
reached.
Once the ON delay (p2177) has elapsed, the message "Motor blocked" and fault F07900 are
generated.
The enable for the blocking monitoring can be deactivated via p2144.
Figure 9-48 Blocking protection
Function diagram
FP 8012
Parameters
• p2144
• p2175
• p2177
Converter cabinet units
Operating Instructions, 11/2017, A5E36652151A
Signals and monitoring functions - Torque messages, motor blocked/stalled
BI: Motor blocking monitoring enable (negated)
Motor blocked speed threshold
Motor blocked delay time
Functions, monitoring and protective functions
9.5 Monitoring functions and protective functions
673