Stall Protection (Only For Vector Control) - Siemens SINAMICS S120 Function Manual

8.4

Stall protection (only for vector control)

If the adaptation controller output exceeds the speed threshold set in p1744 for stall
detection, then r1408.11 (speed adaptation, speed deviation) is set.
If the error threshold value set in p1745 is exceeded when in the low speed range (less than
p1755 * (100% - p1756)), then r1408.12 (motor stalled) is set.
If one of the two signals is set, then after the delay time in p2178, fault F7902 (motor stalled)
is output.
Figure 8-2 Stall protection
Function diagrams (see SINAMICS S120/S150 List Manual)
• 6730
• 8012
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• r1408.0...15 CO/BO: Status word, current controller
• p1744[0...n] Motor model speed threshold stall detection
• p1745[0...n] Motor model error threshold stall detection
• p1755[0...n] Motor model changeover speed encoderless operation
• p1756
• p2178[0...n] Motor stalled delay time
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
Vector control - Interface to Motor Module (ASM, p0300 = 1)
Signals and monitoring functions - Torque messages, motor locked/stalled
Motor model changeover speed encoderless operation
Monitoring and protective functions
8.4 Stall protection (only for vector control)
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