46 • vacon
ASFIFF12 High Speed
Tel. +358 (0)201 2121 • Fax +358 (0)201 212 205
Par. ID711
NX12k64
Trip area
Time
Stall time counter
Stall
No stall
Trip/warning
par. ID709
Par. ID714
NX12k65
Par. ID715
f
5 Hz
Underload area
Torque
Fieldweakening
point par. ID602
711 Stall
time
(2.7.15)
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
Figure 5-21. Stall time count
712
Stall frequency limit
(2.7.16)
The frequency can be set between 1-f
max
).
For a stall state to occur, the output frequency must have remained below this limit. See
chapter 6.4.
713 Underload
protection
(2.7.17)
0
= No response
1
= Warning
2
= Fault, stop mode after fault according to
3
= Fault, stop mode after fault always by coasting
If tripping is set active the drive will stop and activate the fault stage.
Deactivating the protection by setting the parameter to 0 will reset the underload time
counter to zero. See chapter 6.5.
714
Underload protection, field weakening area load
(2.7.18)
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
5-22.
If you change parameter
(Motor nominal current) this para-
meter is automatically restored to
the default value. See chapter 6.5.
Figure 5-22. Setting of minimum load