Operating instructions

Functions, monitoring, and protective functions
9.5 Monitoring and protective functions
Drive converter cabinet units
Operating Instructions, 10/2008, A5E00288214A
409
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.
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F 7902
r 2198 . 7
p 2178 ( 0 . 010 )
0 ,000... 1 ,000 s
≥ 1
r 1408 . 12
r 1408 . 11
0 . 00 ... 210 000 . 00 1 / min
p 1744 ( 100 . 00 )
p 1745 ( 5 . 0 )
0 . 0 ... 1000 . 0 %
Figure 9-29 Stall protection
Function diagram
FD 6730 Current control
FD 8012 Messages and monitoring - Torque messages, motor blocked/stalled
Parameters
• r1408
CO/BO: Control status word 3
• p1744
Motor model speed threshold stall detection
• p1745
Motor model error threshold stall detection
• p1755
Motor model changeover speed encoderless operation
• p1756
Motor model changeover speed hysteresis
• p2178
Delay time motor stalled