Danfoss VLT AutomationDrive FC 300 Series, Programming Manual, Page: 67 / 211

3.6 Parameters: 4-** Limits/Warnings
3.6.1 4-1* Motor Limits
Define torque, current and speed limits for the motor, and
the reaction of the frequency converter when the limits are
exceeded.
A limit may generate a message on the display. A warning
will always generate a message on the display or on the
fieldbus. A monitoring function may initiate a warning or a
trip, upon which the frequency converter will stop and
generate an alarm message.
4-10 Motor Speed Direction
Option: Function:
Select the motor speed direction(s) required.
Use this parameter to prevent unwanted
reversing. When
1-00 Configuration Mode is
set to Process [3], 4-10 Motor Speed Direction is
set to Clockwise [0] as default. The setting in
4-10 Motor Speed Direction does not limit
options for setting 4-13 Motor Speed High
Limit [RPM] .
[0]
*
Clockwise The reference is set to CW rotation. Reversing
input (Default term 19) must be open.
[1] Counter
clockwise The reference is set to CCW rotation.
Reversing input (Default term 19) must be
closed. If Reversing is required with ‘Reverse’
input is open the motor direction can be
changed by
1-06 Clockwise Direction
[2] Both
directions Allows the motor to rotate in both directions.
NOTE
This parameter cannot be adjusted while the motor is
running.
4-11 Motor Speed Low Limit [RPM]
Range: Function:
Size
related
*
[ 0 - par.
4-13 RPM] Enter the minimum limit for motor
speed. The Motor Speed Low Limit can
be set to correspond to the
manufacturer’s recommended
minimum motor speed. The Motor
Speed Low Limit must not exceed the
setting in
4-13 Motor Speed High Limit
[RPM] .
4-12 Motor Speed Low Limit [Hz]
Range: Function:
Size related
*
[ 0.0 -
par. 4-14
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 Motor Speed Low Limit must not
4-12 Motor Speed Low Limit [Hz]
Range: Function:
exceed the setting in 4-14 Motor Speed
High Limit [Hz] .
4-13 Motor Speed High Limit [RPM]
Range: Function:
Size
related
*
[ par. 4-11
- 60000.
RPM] Enter the maximum limit for motor
speed. The Motor Speed High Limit
can be set to correspond to the
manufacturer’s maximum rated motor
speed. The Motor Speed High Limit
must exceed the setting in
4-11 Motor
Speed Low Limit [RPM] .
NOTE
Max. output frequency cannot exceed 10% of the inverter
switching frequency (
14-01 Switching Frequency ).
4-14 Motor Speed High Limit [Hz]
Range: Function:
Size
related
*
[par.
4-12 -
par. 4-19
Hz] Enter the maximum limit for motor speed.
The Motor Speed High Limit can be set to
correspond to the manufacturer’s
recommended maximum of the motor
shaft. The Motor Speed High Limit must
exceed the in
4-12 Motor Speed Low Limit
[Hz] . Only 4-13 Motor Speed High Limit
[RPM] or 4-14 Motor Speed High Limit [Hz]
will be displayed depending on other
parameters in the Main Menu and
depending on default settings dependant
on global location.
NOTE
Max. output frequency cannot exceed 10% of the inverter
switching frequency (
14-01 Switching Frequency ).
4-16 Torque Limit Motor Mode
Range: Function:
Size related
*
Application
dependent
*
[ 0.0 - 1000.0 %]
[Application
dependant] This function limits the
torque on the shaft to
protect the mechanical
installation.
NOTE
Changing 4-16 Torque Limit Motor Mode when 1-00 Configu-
ration Mode is set to Speed open loop [0], 1-66 Min. Current
at Low Speed is automatically readjusted.
NOTE
The torque limit reacts on the actual, non-filtrated torque,
including torque spikes. This is not the torque that is seen
from the or the as that is filtered.
Parameter Descriptions
VLT
®
AutomationDrive Programmming Guide
66 MG33ME02 - VLT
®
is a registered Danfoss trademark
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