Parameters: Limits/Warnings - Danfoss FC 300 Design Manual

FC 300 Design Guide

Parameters: Limits/Warnings

"
4-** Motor Limits
"
Parameter group for configuring limits and warnings.
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:
*
Clockwise
Counter-clockwise
Both directions
Function:
Select the motor speed direction(s) required. Use
this parameter to prevent unwanted reversing.
When par. 1-00 Configuration Mode is set to
Process [3], par. 4-10 is set to Clockwise [0]
as default. The setting in par. 4-10 does not
limit options for setting par. 4-13.
This parameter cannot be adjusted while
the motor is running.
4-11 Motor Speed Low Limit [RPM]
Range:
0 - par. 4-13 RPM
Function:
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 par. 4-13 Motor
Speed High Limit [RPM].
4-12 Motor Speed Low Limit [Hz]
Range:
0 - par. 4-14 Hz
Function:
Enter the minimum limit for motor speed. The
motor speed low limit can be set to correspond to
* default setting ( )
How to Program
[0]
[1]
[2]
*
0 RPM
*
display text [ ] value for use in communication via serial communication port
MG.33.B6.22 - VLT is a registered Danfoss trademark
the minimum output frequency of the motor shaft.
The motor speed low limit must not exceed the
setting in par. 4-14 Motor Speed High Limit [Hz].
4-13 Motor Speed High Limit [RPM]
Range:
Par. 4-11 - Variable Limit RPM
Function:
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 par. 4-11 Motor Speed Low Limit [RPM].
NOTE
The output frequency value of the
adjustable frequency drive must not
exceed a value higher than 1/10
of the switching frequency.
4-14 Motor Speed High Limit [Hz]
Range:
Par. 4-12 - Variable limit Hz
Function:
Enter the maximum limit for motor speed. The
motor speed high limit can be set to correspond
to the manufacturer's recommended maximum
frequency of the motor shaft. The motor speed
high limit must exceed the setting in par. 4-12
Motor Speed Low Limit [Hz].
NOTE
The output frequency value of the
adjustable frequency drive must not
exceed a value higher than 1/10
of the switching frequency.
4-16 Torque Limit Motor Mode
Range:
0.0 - Variable Limit %
Function:
Enter the maximum torque limit for motor operation.
The torque limit is active in the speed range
0 Hz
up to and including the rated motor speed set
in par. 1-25 Motor Nominal Speed. To protect
the motor from reaching the stalling torque, the
default setting is 1.6 x the rated motor torque
*
3600. RPM
*
120 Hz
*
160.0 %
187