Danfoss VLT Programming Guide

26-15 Term. X42/1 High Ref./Feedb. Value
Range: Function:
100.000 N/
A*
[-999999.999 - 999999.999 N/A] Enter the analog input scaling value that corresponds to the high voltage value set in
par. 26-11
Terminal X42/1 High Voltage .
26-16 Term. X42/1 Filter Time Constant
Range: Function:
0.001 s* [0.001 - 10.000 s] Enter the time constant. This is a first-order digital low pass filter time constant for suppressing
noise in terminal X42/1. A high time constant value improves dampening but also increases the time
delay through the filter. This parameter cannot be adjusted while the motor is running.
26-17 Term. X42/1 Live Zero
Option: Function:
This parameter makes it possible to enable the Live Zero monitoring. E.g. where the analog input
is a part of the frequency converter control, rather than being used as part of a decentral I/O system,
such as a Building Management System.
[0] Disabled
[1] * Enabled
3.24.4 26-2* Analog Input X42/3
Parameters for configuring the scaling and limits for analog input, terminal X42/3.
26-20 Terminal X42/3 Low Voltage
Range: Function:
0.07 V* [Application dependant] Enter the low voltage value. This analog input scaling value should correspond to the low reference/
feedback value set in par. 26-24
Term. X42/3 Low Ref./Feedb. Value .
26-21 Terminal X42/3 High Voltage
Range: Function:
10.00 V* [Application dependant] Enter the high voltage value. This analog input scaling value should correspond to the high refer-
ence/feedback value set in par. 26-25
Term. X42/3 High Ref./Feedb. Value .
26-24 Term. X42/3 Low Ref./Feedb. Value
Range: Function:
0.000 N/A* [-999999.999 - 999999.999 N/A] Enter the analog input scaling value that corresponds to the low voltage value set in
par. 26-20
Terminal X42/3 Low Voltage .
26-25 Term. X42/3 High Ref./Feedb. Value
Range: Function:
100.000 N/
A*
[-999999.999 - 999999.999 N/A] Enter the analog input scaling value that corresponds to the high voltage value set in
par. 26-21
Terminal X42/3 High Voltage .
26-26 Term. X42/3 Filter Time Constant
Range: Function:
0.001 s* [0.001 - 10.000 s] Enter the time constant. This is a first-order digital low pass filter time constant for suppressing
noise in terminal X42/3. A high time constant value improves dampening but also increases the time
delay through the filter. This parameter cannot be adjusted while the motor is running.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark 257
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)