Stall Protection (Only For Vector Control) - Siemens SINAMICS S150 Operating Instructions Manual

Functions, monitoring, and protective functions
9.5 Monitoring and protective functions
9.5.4

Stall protection (only for vector control)

Description
If, for closed-loop speed control with encoder, the speed threshold set in p1744 for stall
detection is exceeded, then r1408.11 (speed adaptation, speed deviation) is set.
If the fault threshold value set in p1745 is exceeded when in the low speed range (less than
p1755 x p1756), 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.
0 . 00 ... 210 000 . 00 1 / min
p 1744 ( 100 . 00 )
p 1745 ( 5 . 0 )
0 . 0 ... 1000 . 0 %
Figure 9-30 Stall protection
Function diagram
FD 6730
FD 8012
Parameters
• r1408
• p1744
• p1745
• p1755
• p1756
• p2178
404
r 1408 . 11
r 1408 . 12
Current control
Messages and monitoring - Torque messages, motor blocked/stalled
CO/BO: Control status word 3
Motor model speed threshold stall detection
Motor model error threshold stall detection
Motor model changeover speed encoderless operation
Motor model changeover speed hysteresis
Delay time motor stalled
T 0
≥ 1
p 2178 ( 0 . 010 )
0 ,000... 1 ,000 s
Operating Instructions, 07/07, A5E00288214A
r 2198 . 7
F 7902
Drive converter cabinet units