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 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: 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].
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 when ‘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.
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 4-13 Motor Speed High
Limit [RPM].
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
in 4-14 Motor Speed High Limit
[Hz].
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 4-14 Motor Speed High Limit
[Hz].
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 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:
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 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.
Parameter Descriptions FC 300 Programming Guide
3-42 MG.33.MA.22 - VLT
®
is a registered Danfoss trademark
3
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