4.5 Parameters: 4-** Limits/Warnings
4.5.1 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 in the display. A warning
always generates a message in the display or on the
fieldbus. A monitoring function may initiate a warning or a
trip, upon which the frequency converter stops and
generates an alarm message.
4-10 Motor Speed Direction
Option:
Function:
[0]
Clockwise
Only operation in clockwise direction is
allowed.
[2]
*
Both directions Operation in both clockwise and counter-
clockwise directions are allowed.
NOTICE
The setting in
parameter 4-10 Motor Speed Direction
has
impact on
parameter 1-73 Flying Start
.
4-12 Motor Speed Low Limit [Hz]
Range:
Function:
0 Hz
*
[ 0 -
400.0 Hz]
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
parameter 4-14 Motor Speed High Limit [Hz]
.
4-14 Motor Speed High Limit [Hz]
Range:
Function:
65
Hz
*
[ 0.1 -
500 Hz]
NOTICE
Max. output frequency cannot exceed
10% of the inverter switching frequency
(
parameter 14-01 Switching Frequency
).
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 value in
.
4-16 Torque Limit Motor Mode
Range:
Function:
Size related
*
[ 0 - 1000 %] This function limits the torque on
the shaft to protect the mechanical
installation.
4-17 Torque Limit Generator Mode
Range:
Function:
100 %
*
[ 0 - 1000 %] This function limits the torque on the
shaft to protect the mechanical instal-
lation.
4-18 Current Limit
Range:
Function:
Size
related
*
[ 0 -
1000 %]
This is a true current limit function that
continues in the oversynchronous range.
However, due to field weakening, the
motor torque at current limit drops
accordingly when the voltage increase
stops above the synchronised motor
speed.
4-19 Max Output Frequency
Range:
Function:
Size
related
*
[ 0 -
500
Hz]
NOTICE
This parameter cannot be adjusted
while the motor is running.
NOTICE
Max. output frequency cannot exceed
10% of the inverter switching frequency
(
parameter 14-01 Switching Frequency
).
Provides a final limit on the output frequency
for improved safety in applications at risk of
overspeeding. This limit is final in all configu-
rations (independent of the setting in
parameter 1-00 Configuration Mode
).
4.5.2 4-2* Limit Factors
4-20 Torque Limit Factor Source
Select an analog input for scaling the settings in
parameter 4-16 Torque Limit Motor Mode
and
parameter 4-17 Torque Limit Generator Mode
from 0% to 100% (or
inverse). The signal levels corresponding to 0% and 100% are
defined in the analog input scaling, for example, parameter
group
6-1* Analog Input 1
. This parameter is only active when
parameter 1-00 Configuration Mode
is set to
[0] Open Loop
or
[1]
Speed Closed Loop
.
Option:
Function:
[0]
*
No function
[2]
Analog in 53
[4]
Analog in 53 inv
[6]
Analog in 54
[8]
Analog in 54 inv
Parameter Descriptions
VLT
®
AutomationDrive FC 360
46
Danfoss A/S © 7/2015 All rights reserved.
MG06C602
4
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