Danfoss VLT HVAC Basic Drive FC 101 Programming Guide

3.5 Main Menu - Limits/Warnings - Group 4
3.5.1 4-1* Motor Limits
Dene current and speed limits for the motor, and the
reaction of the frequency converter when the limits are
exceeded.
4-10 Motor Speed Direction
Option: Function:
[0] Clockwise
NOTICE
The setting in parameter 4-10 Motor
Speed Direction has impact on
parameter 1-73 Flying Start.
Only operation in clockwise direction is
allowed.
[2] * Both
directions
Operation in both clockwise and counter-
clockwise directions is allowed.
4-12 Motor Speed Low Limit [Hz]
Range: Function:
0 Hz* [ 0 -
400.0 Hz]
Enter the minimum limit for motor speed. The
motor speed low limit can be set to
correspond to the minimum output frequency
of the motor shaft. The speed low limit must
not exceed the setting in
parameter 4-14 Motor Speed High Limit [Hz].
4-14 Motor Speed High Limit [Hz]
Range: Function:
Size
related*
[ 0.1 -
400.0 Hz]
Enter the maximum limit for motor speed.
It can be set to match the recommended
maximum motor speed. The motor speed
high limit must exceed the value in
parameter 4-12 Motor Speed Low Limit [Hz].
Motor speed high limit cannot be set
higher than parameter 4-19 Max Output
Frequency.
4-18 Current Limit
Range: Function:
110
%*
[0 -
1000 %
]
Enter the current limit for motor and generator
operation (in % of rated motor current). If the
value is higher than maximum rated output from
frequency converter, current is still limited to the
maximum output current of the frequency
converter. If a setting in parameter 1-00 Congu-
ration Mode to parameter 1-25 Motor Nominal
Speed is changed, parameter 4-18 Current Limit is
not automatically reset to the default setting.
4-19 Max Output Frequency
Range: Function:
Size
related*
[ 0 -
400
Hz]
Enter the maximum output frequency, which
denes the absolute limit on the frequency
converter output frequency for improved
safety in applications where unintended
overspeeding must be avoided. This absolute
limit applies to all congurations and is
independent of the setting in
parameter 1-00 Conguration Mode.
When parameter 1-10 Motor Construction is set
to one of the options enabling PM motor
construction, the maximum limit of
parameter 4-19 Max Output Frequency might
be limited by the setting of
parameter 1-40 Back EMF at 1000 RPM due to
avoid a too high Back EMF, which can damage
the frequency converter. If parameter 4-19 Max
Output Frequency is set lower than
parameter 4-14 Motor Speed High Limit [Hz], the
value of parameter 4-14 Motor Speed High Limit
[Hz] is adjusted to the same value of
parameter 4-19 Max Output Frequency automat-
ically.
3.5.2 4-4* Adjustable Warnings 2
4-40 Warning Freq. Low
Range: Function:
Size
related*
[ 0 -
500
Hz]
Use this parameter to set a lower limit for the
frequency range.
When the motor speed drops below this limit,
the display reads SPEED LOW. Warning bit 10
is set in parameter 16-94 Ext. Status Word. The
output relay or the digital output can be
congured to indicate this warning. The LCP
warning indicator light is not turned on when
this parameter set limit is reached.
4-41 Warning Freq. High
Range: Function:
Size
related*
[ 0 -
500
Hz]
Use this parameter to set a higher limit for
the frequency range.
When the motor speed exceeds this limit, the
display reads SPEED HIGH. Warning bit 9 is set
in parameter 16-94 Ext. Status Word. The
output relay or the digital output can be
congured to indicate this warning. The LCP
warning indicator light is not turned on when
this parameter set limit is reached.
Parameters
VLT
®
HVAC Basic Drive FC 101
44 Danfoss A/S © 04/2018 All rights reserved. MG18B502
33

Danfoss VLT HVAC Basic Drive FC 101 Specifications

General

Brand	Danfoss
Model	VLT HVAC Basic Drive FC 101
Category	DC Drives
Language	English