Operating Instructions

Siemens Application Siemens Industry, Inc. • 83
24-hour support [phone] (Dial 2)
3
Figure 24. Stall characteristics settings.
Stall time limit (P3.9.13)
This time can be set between 1.0 and 120.0s.
This is the maximum time allowed for a stall stage. The stall time is counted by an internal up/down
counter.
If the stall time counter value goes above this limit, the protection will cause a trip (see P3.9.11). See
page 49.
Figure 25. Stall time count.
Underload protection: Field weakening area load (P3.9.16)
The torque limit can be set between 10.0-150.0% x T
nMotor
.
This parameter gives the value for the minimum torque allowed when the output frequency is above the
field weakening point. See Figure 26.
If you change parameter P3.1.1.4 (Motor nominal current), this parameter is automatically restored to
the default value. See page 52.
f
I
Par. P3.9.12
Par. P3.9.14
11100.emf
Stall area
Par. P3.9.13
11101.emf
Tr i p ar ea
Ti m e
St al l t i m e coun t er
St al l 
No stall
Tr i p / w a r n i n g
par. P3.9.11