FC 300 Design Guide
How to Program
" Parameters: Limits/Warnings
" 4-** Motor Limits
Parameter group for configuring lim its 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 messag e 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 [0]
Counter-clockwise [1]
Both directions [2]
Function:
Select the motor speed direction(s) required. Use
this parameter to prevent unwanted reversing.
When par. 1-00 Configuration Mode is se t 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 L imit [RPM]
Range:
0-par. 4-13RPM
*
0RPM
Function:
Enter the minimum limit for motor speed. The
motor speed low limit can b e set to correspond
to the manufacturer ’s recommended minimum
motor speed. The motor speed low limit must
not e xceed the setting in par. 4-13 Mot
or
Speed High Limit [RPM].
4-12 Motor Spe ed Low Limit [Hz]
Range:
0 - par. 4-14 Hz
*
0Hz
Function:
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 par. 4-14 Motor Speed High Limit [Hz].
4-13 Motor Speed High Limit [RPM]
Range:
Par. 4-11 - Variable Lim it RPM
*
3600. 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 m otor speed high limit must exceed the s etting
in par. 4-11 Motor Speed Low Limit [RPM].
NOTE
The output frequenc y value of the
adjustable frequency d rive 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
*
120 Hz
Function:
Enter the maximum limit for motor speed. The
motor s peed high limit can be set to correspond
to the manufacturer’s recommended maximum
frequency of the motor shaft. The motor speed
high limit must e xceed the setting in par. 4-12
Motor Speed Low Limit [Hz].
NOTE
The output frequenc y value of the
adjustable frequency d rive must not
exceed a value higher than 1/10
of the switching frequency.
4-16 Torque Limit Motor Mode
Range:
0.0-VariableLimit%
*
160.0 %
Function:
Enter the maximum torque limit for motor oper
ation.
The torque limit is active in the s peed range
up to an d including the rated motor speed set
in par. 1-25 Motor Nominal Speed.Topro
tect
the motor fro m reaching the stalling torque , the
default setting is 1.6 x the rated motor torque
*
default setting ()display text []value for use in communication via serial communication port
187
MG.33.B
6.22 - V LT is a registered Danfoss trademark
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