Blocking Protection - Siemens SINAMICS S120 Function Manual

Monitoring functions and protective functions

9.3 Blocking protection

9.3 Blocking protection
The "Motor blocked" fault is only output if the speed of the drive is below the adjustable
speed threshold (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 blocked motor monitoring can be deactivated using p2144.
Figure 9-1 Blocking protection
Function diagrams (see SINAMICS S120/S150 List Manual)
• 8012
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• p2144[0...n]
• p2175[0...n]
• p2177[0...n]
638
Signals and monitoring functions - Torque messages, motor locked/stalled
BI: Blocked motor monitoring enable (negated)
Motor locked speed threshold
Motor locked delay time
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions