Danfoss VLT Programming Guide

21-24 Ext. 1 Dif. Gain Limit
Range: Function:
5.0 N/A* [1.0 - 50.0 N/A] Set a limit for the differentiator gain (DG). The DG will increase if there are fast changes. Limit the
DG to obtain a pure differentiator gain at slow changes and a constant differentiator gain where
quick changes occur.
3.19.5 21-3* Closed Loop 2 Ref/Fb
Configure Extended Closed Loop 2 Controller reference and feedback.
21-30 Ext. 2 Ref./Feedback Unit
Option: Function:
See par. 21-10 Ext. 1 Ref./Feedback Unit for details
[0]
[1] * %
[5] PPM
[10] 1/min
[11] RPM
[12] Pulse/s
[20] l/s
[21] l/min
[22] l/h
[23] m³/s
[24] m³/min
[25] m³/h
[30] kg/s
[31] kg/min
[32] kg/h
[33] t/min
[34] t/h
[40] m/s
[41] m/min
[45] m
[60] °C
[70] mbar
[71] bar
[72] Pa
[73] kPa
[74] m WG
[75] mm Hg
[80] kW
[120] GPM
[121] gal/s
[122] gal/min
[123] gal/h
[124] CFM
[125] ft³/s
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark 195
3

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)