Vacon NXP, Руководство пользователя

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44 • vacon Description of parameters
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
(2.7.14)
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 ID709 ).
Figure 21. Stall time count
712 Stall frequency limit
(2.7.15)
The frequency can be set between 1-f
max
(
ID102 ).
For a stall state to occur, the output frequency must have remained below this limit.
713 Underload protection
(2.7.16)
0 = No response
1 = Warning
2 = Fault, stop mode after fault according to ID506
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.
714 Underload protection, field weakening area load
(2.7.17)
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 22.
If you change parameter
ID113 (Motor
nominal current) this parameter is auto-
matically restored to the default value.
Figure 22. Setting of minimum load