Motor Limits; Motor Speed Direction; Torque Limit Motor Mode; Max Output Frequency - Danfoss VLT AutomationDrive Programming Manual

Parameter Descriptions

3.6 Parameters: 4-** Limits/Warnings

3.6.1 4-1* Motor Limits

3 3
Define torque, current and speed limits for the motor, and
the reaction of the Adjustable frequency drive 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
serial communication bus. A monitoring function may
initiate a warning or a trip, upon which the Adjustable
frequency drive will stop and generate an alarm message.

4-10 Motor Speed Direction

Option:
[0] Clockwise
*
[1] Counter
clockwise
[2] Both
directions
NOTE!
This parameter cannot be adjusted while the motor is
running.
4-11 Motor Speed Low Limit [RPM]
Range:
Application dependent
4-12 Motor Speed Low Limit [Hz]
Range:
Application dependent
4-13 Motor Speed High Limit [RPM]
Range:
Application dependent
NOTE!
Max. output frequency cannot exceed 10% of the inverter
switching frequency (14-01 Switching Frequency).
3-44
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FC 300 Programming Guide
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].
The reference is set to CW rotation. Reversing
input (Default term 19) must be open.
The reference is set to CCW rotation.
Reversing input (Default term 19) must be
closed. If reversing is required when 'Reverse'
input is open, the motor direction can be
changed by 1-06 Clockwise Direction
Allows the motor to rotate in both directions.
[Application dependant]
*
[Application dependant]
*
[Application dependant]
*
MG33MD22 - VLT
4-14 Motor Speed High Limit [Hz]
Range:
Size related
*
NOTE!
Max. output frequency cannot exceed 10% of the inverter
switching frequency (14-01 Switching Frequency).

4-16 Torque Limit Motor Mode

Range:
Application dependent
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 LCP or the serial communication bus as that is
filtered.
4-17 Torque Limit Generator Mode
Range:
100.0 %
*
NOTE!
The torque limit reacts on the actual, non-filtrated torque,
including torque spikes. This is not the torque that is seen
from the LCP or the serial communication bus as that is
filtered.
4-18 Current Limit
Range:
Application dependent
NOTE!
Function:
If [20] is selected in 1-90 Motor Thermal Protection,
4-18 Current Limit current limit must be set to 150%.

4-19 Max Output Frequency

Function:
Range:
132.0 [1.0 -
Hz 1000.0 Hz]
*
Function:
®
is a registered Danfoss trademark
[ par. 4-12 - par. 4-19 Hz]
[Application dependant]
*
[Application dependant]
[Application dependant]
*
Function:
Provides a final limit on the output
frequency for improved safety in
applications where you want to avoid
accidental overspeeding. This limit is
final in all configurations (independent
of the setting in 1-00 Configuration
Mode).
Function:
Function:
Function:
Function: