Main Menu - Limits/Warnings - Group; Motor Limits; Adj. Warnings - Danfoss VLT HVAC Basic Drive Programming Manual

Parameters

3.5 Main Menu - Limits/Warnings - Group 4

3.5.1 4-1* Motor Limits

Define 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 Only operation in clockwise direction will be
allowed.
[2] Both directions Operation in both clockwise and anti-
*
clockwise direction will be allowed.
NOTE
The setting in 4-10 Motor Speed Direction has impact on
1-73 Flying Start.
4-12 Motor Speed Low Limit [Hz]
Range: Function:
0.0 Hz [0.0 - 400.0 Enter the minimum limit for motor speed.
*
Hz] 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
4-14 Motor Speed High Limit [Hz].
4-14 Motor Speed High Limit [Hz]
Range: Function:
65.0 Hz [0.1 - 400.0 Enter the maximum limit for motor speed.
*
Hz] 4-14 Motor Speed High Limit [Hz] can be set
to match the manufacturer's
recommended max. motor speed. The
Motor Speed High Limit must exceed the
value in 4-12 Motor Speed Low Limit [Hz].
NOTE
Max. output frequency cannot exceed 10% of the inverter
switching frequency (14-01 Switching Frequency).
NOTE
Motor Speed High Limit cannot be set higher than 4-19 Max
Output Frequency.
VLT HVAC Basic Drive Programming Guide
4-18 Current Limit
Range:
110.0
%
4-19 Max Output Frequency
Range:
65.0
Hz

3.5.2 4-5* Adj. Warnings

Define adjustable warning limits for current. Warnings are
shown on the display, programmed output or serial bus.
4-50 Warning Current Low
Range:
0.00 A
4-51 Warning Current High
Range:
194.00 A
4-58 Missing Motor Phase Function
Option:
[0]
[1]
®
MG.18.B1.02 - VLT is a registered Danfoss trademark
Function:
[0.0 - Enter the current limit for motor and
300.0 %] generator operation (in % of rated motor
*
current. If the value is higher than maximum
rated output from frequency convterter,
current will still be limited by the frequency
converters maximum current). If a setting in
1-00 Configuration Mode to 1-25 Motor Nominal
Speed is changed, 4-18 Current Limit is not
automatically reset to the default setting.
Function:
[0.0 - Enter the max. output frequencyvalue.
400.0 Hz] 4-19 Max Output Frequency specifies the
*
absolute limit on the frequency converter
output frequency for improved safety in
applications where accidental over-speeding
must be avoided. This absolute limit applies
to all configurations and is independent of
the setting in 1-00 Configuration Mode.
Function:
[0.00 - Enter the I-low value. When the motor
*
194.00 A] current falls below this limit, a bit in the
drives statusword will be set. This value can
also be programmed to produce a signal on
the digital output or the relay output.
Function:
[0.00 - Enter the I-high value. When the motor
*
194.00 A] current exceeds this limit, a bit in the
drives statusword will be set. This value
can also be programmed to produce a
signal on the digital output or the relay
output.
Function:
Select On, to display an alarm in the event of a missing
motor phase. Select Off, for no missing motor phase
alarm. However the On setting is strongly recommended
to avoid motor damage.
Off No alarm is displayed if a missing motor phase occurs.
On An alarm is displayed is a missing motor phase occurs.
*
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