3.6 Main Menu - Limits/Warnings - Group 4
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:
Selects the motor speed direction required.
Use this parameter to prevent unwanted
reversing.
[0]
Clockwise
Only operation in clockwise direction will be
allowed.
[2]
*
Both directions Operation in both clockwise and anti-
clockwise direction will be allowed.
NOTE
The setting in
has impact on the
Flying Start in
.
4-11 Motor Speed Low Limit [RPM]
Range:
Function:
Size related
*
[0 - par. 4-13 RPM]
4-12 Motor Speed Low Limit [Hz]
Range:
Function:
Size related
*
[0 - par. 4-14 Hz]
4-13 Motor Speed High Limit [RPM]
Range:
Function:
Size related
*
[par. 4-11 - 60000. RPM]
NOTE
Max. output frequency cannot exceed 10% of the inverter
switching frequency (
).
NOTE
Any changes in
4-13 Motor Speed High Limit [RPM]
will reset
the value in
to the same value as set
in
4-13 Motor Speed High Limit [RPM]
4-14 Motor Speed High Limit [Hz]
Range:
Function:
Size related
*
[par. 4-12 - par. 4-19 Hz]
NOTE
Max. output frequency cannot exceed 10% of the inverter
switching frequency (
).
4-16 Torque Limit Motor Mode
Range:
Function:
Size related
*
[0.0 - 1000.0 %]
4-17 Torque Limit Generator Mode
Range:
Function:
100.0
%
*
[0.0 -
1000.0 %]
Enter the maximum torque limit for
generator mode operation. The torque limit
is active in the speed range up to and
including the rated motor speed (
). Refer to
for further details.
If a setting in
to
is changed,
4-17 Torque Limit Generator Mode
is not
automatically reset to the default settings.
4-18 Current Limit
Range:
Function:
Size related
*
[1.0 - 1000.0 %]
4-19 Max Output Frequency
Range:
Function:
Size
related
*
[1.0 -
1000.0 Hz]
Enter the maximum output frequency
value.
specifies
the absolute limit on the frequency
converter output frequency for improved
safety in applications where accidental
over-speeding must be avoided. This
absolute limit applies to all configurations
and is independent of the setting in
. This parameter
cannot be adjusted while the motor is
running.
Parameter Description
VLT
®
HVAC Drive Programming Guide
54
MG.11.CB.02 - VLT
®
is a registered Danfoss trademark
3
3
