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
is set
to
Process
[3],
is set
to
Clockwise
[0] as default. The setting in
does not limit
options for setting
.
This parameter cannot be adjusted while the
motor is running.
[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
[2]
Both
directions
Allows the motor to rotate in both directions.
4-11 Motor Speed Low Limit [RPM]
Range:
Function:
Application
dependent
*
[Application
dependant]
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
4-12 Motor Speed Low Limit [Hz]
Range:
Function:
Application
dependent
*
[Application
dependant]
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 exceed the setting
4-12 Motor Speed Low Limit [Hz]
Range:
Function:
in
.
Application
dependent
*
[Application
dependant]
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 exceed the setting
in
.
4-13 Motor Speed High Limit [RPM]
Range:
Function:
Application
dependent
*
[Application
dependant]
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
NOTE
Max. output frequency cannot exceed 10% of the inverter
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
4-11 Motor Speed Low Limit [RPM]
or
4-12 Motor Speed Low 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
).
Parameter Descriptions
FC 300 Programming Guide
64
MG.33.MB.02 - VLT
®
is a registered Danfoss trademark
3
3
