3.5 Main Menu - Limits/Warnings - Group 4
3.5.1 4-1* Motor Limits
Define current and speed limits for the compressor, and
the reaction of the frequency converter when the limits are
exceeded.
4-12 Motor Speed Low Limit [Hz]
Range:
Function:
Size
related
*
[ 0 - 200 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:
200 Hz
*
[ 30 - 205 Hz] Enter the maximum limit for
compressor speed.
Parameter 4-14 Motor Speed High
Limit [Hz]
can be set to match the
manufacturer's recommended
maximum compressor speed. The
motor speed high limit must
exceed the value in
parameter 4-12 Motor Speed Low
Limit [Hz]
.
NOTICE
Motor speed high limit cannot
be set higher than
parameter 4-19 Max Output
Frequency
.
4-18 Current Limit
Range:
Function:
Size
related
*
[ 0 - 1000 %] Enter the current limit for
compressor operation (in % of rated
compressor current. If the value is
higher than the maximum rated
output from the frequency
converter, the current is still limited
to the frequency converters
maximum output current). If a
setting in
parameter 1-13 Compressor Selection
is changed,
is automatically reset to the
default value.
4-19 Max Output Frequency
Range:
Function:
Size
related
*
[ 0.0 - 400
Hz]
Enter the maximum output
frequency value.
Parameter 4-19 Max Output
Frequency
specifies the absolute
limit on the frequency converter
output frequency for improved
safety in applications where
accidental overspeeding must be
avoided. This absolute limit applies
to all configurations and is
independent of the setting in
parameter 1-00 Configuration Mode
.
3.5.2 4-4* Adjustable Warnings 2
4-40 Warning Freq. Low
Use this parameter to set a lower limit for the frequency range.
Range:
Function:
Size
related
*
[ 0 - 500 Hz]
When the compressor speed drops
below this limit, the display reads
SPEED LOW. Warning bit 10 is set in
parameter 16-94 Ext. Status Word
.
Output relay can be configured to
indicate this warning. The LCP
warning light does not light when
this parameter set limit is reached.
4-41 Warning Freq. High
Use this parameter to set a higher limit for the frequency range.
Range:
Function:
Size
related
*
[ 0 - 500 Hz]
When the compressor speed
exceeds this limit, the display reads
SPEED HIGH. Warning bit 9 is set in
parameter 16-94 Ext. Status Word
.
Output relay can be configured to
indicate this warning. The LCP
warning light does not light when
this parameter set limit is reached.
3.5.3 4-5* Adj. Warnings
Define adjustable warning limits for current. Warnings are
shown on the display, programmed output, or fieldbus.
4-50 Warning Current Low
Range:
Function:
0 A
*
[ 0 - 500 A]
Enter the I
LOW
value. When the
compressor current drops below
this limit, a bit in the status word is
set. This value can also be
programmed to produce a signal
Parameters
VLT
®
Compressor Drive CDS 803
26
Danfoss A/S © 06/2019 All rights reserved.
MG18P202
3
3
