•
•
•
•
P2.6.10
(Standard Application, Local/Remote Control Application, Multi-step Speed Control Application, PID Control Applica-
tion, Multi-purpose Control Application (VACON
®
NXS), Pump and Fan Control Application)
P2.6.3
(Multi-purpose Control Application, VACON
®
NXP)
Use this parameter to set the overvoltage controller out of operation.
When enabling
ID 607
or
ID 608
, the controllers start to monitor the changes in the supply voltage. The controllers change the out-
put frequency when it becomes too high or too low.
To stop the operation of the undervoltage and the overvoltage controllers, disable these 2 parameters. It is useful if the supply volt-
age changes more than -15% to +10%, and if the application does not tolerate the operation of the controllers.
Selection number
Selection name
Description
0
Controller switched off
-
1
Controller switched on (no ramping)
Minor adjustments of OP frequency are made.
2
Controller switched on (with ramping)
Controller adjusts OP freq. up to max.freq.
When a value other than 0 is selected, also the Closed Loop overvoltage controller becomes active (in Multi-Purpose Control appli-
cation).
10.285 (ID 608) Undervoltage Controller
Location in the menu:
P2.6.11
(Standard Application, Local/Remote Control Application, Multi-step Speed Control Application, PID Control Applica-
tion, Multi-purpose Control Application (VACON
®
NXS), Pump and Fan Control Application)
P2.6.4
(Multi-purpose Control Application, VACON
®
NXP)
Use this parameter to set the undervoltage controller out of operation.
See parameter
ID 607
.
Undervoltage controller is PI-type controller for which the input is the difference of undervoltage reference value and the DC-link
voltage actual value. The controller output is additive to the frequency reference, that is, the undervoltage controller tries to de-
crease the motor speed when there is undervoltage. As an effect, the motoring power is reduced and extra generating power is
obtained from the deceleration of the system inertia. UV-controller is activated when the DC-link voltage drops below the under-
voltage reference voltage.
Overvoltage/undervoltage trips can occur when controllers are switched out of operation.
Selection
number
Selection name
Description
0
Controller switched off
Both open and closed loop undervoltage controllers are off.
1
Controller switched on
(no ramping)
Both open and closed loop undervoltage controllers are activated. If power is restored
when the AC drive is at undervoltage, the controller output frequency regains the refer-
ence value.
2
Controller switched on
(with ramping)
Both open and closed loop controllers are activated. If power is restored after the un-
dervoltage controller has been active, the AC drive ramps to zero speed using ramp
time 2 and generates an undervoltage fault (F9) with subcode S3.
When a value other than 0 is selected also the Closed Loop overvoltage controller becomes active (in Multi-Purpose Control applica-
tion).
10.286 (ID 609) Torque Limit
Location in the menu:
P2.10.1
(Multi-purpose Control Application)
Use this parameter to set the torque limit control between 0.0–300.0%.
In the Multi-Purpose Control application, the torque limit is selected between the minimum of this parameter and the motoring and
generating torque limits
ID 1287
and
ID 1288
.
10.287 (ID 610) Torque Limit Control P-Gain
Location in the menu:
P2.10.2
(Multi-purpose Control Application)
AB296635287482en-000301 / DPD00903
242 | Danfoss A/S © 2023.02
Parameter Descriptions
VACON® NX All-in-One
Application Guide
Содержание VACON NX
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