Danfoss VLT Programming Guide

4-54 Warning Reference Low
Range: Function:
-999999.99
9 N/A*
[Application dependant] Enter the lower reference limit. When the actual reference falls below this limit, the display indicates
Ref Low. The signal outputs can be programmed to produce a status signal on terminal 27 or 29
and on relay output 01 or 02.
4-55 Warning Reference High
Range: Function:
999999.999
N/A*
[Application dependant] Enter the upper reference limit. When the actual reference exceeds this limit, the display reads Ref
High. The signal outputs can be programmed to produce a status signal on terminal 27 or 29 and
on relay output 01 or 02.
4-56 Warning Feedback Low
Range: Function:
-999999.99
9 Proc-
essCtrlU-
nit*
[Application dependant] Enter the lower feedback limit. When the feedback falls below this limit, the display reads Feedb
Low. The signal outputs can be programmed to produce a status signal on terminal 27 or 29 and
on relay output 01 or 02.
4-57 Warning Feedback High
Range: Function:
999999.999
ProcessCtr-
lUnit*
[Application dependant] Enter the upper feedback limit. When the feedback exceeds this limit, the display reads Feedb High.
The signal outputs can be programmed to produce a status signal on terminal 27 or 29 and on relay
output 01 or 02.
4-58 Missing Motor Phase Function
Option: Function:
Displays an alarm in the event of a missing motor phase.
[0] Disabled No alarm is displayed if a missing motor phase occurs.
[2] * Trip 1000 ms
NB!
This parameter cannot be adjusted while the motor is running.
3.6.4 4-6* Speed Bypass
Define the Speed Bypass areas for the ramps.
Some systems call for avoiding certain output frequencies or speeds, due to resonance problems in the system. A maximum of four frequency or speed
ranges can be avoided.
4-60 Bypass Speed From [RPM]
Array [4]
Range: Function:
Application
dependent*
[Application dependant] Some systems call for avoiding certain output speeds due to resonance problems in the system.
Enter the lower limits of the speeds to be avoided.
VLT
®
HVAC Drive Programming Guide 3 Parameter Description
MG.11.C9.02 - VLT
®
is a registered Danfoss trademark 75
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)