Operating instructions

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 par. 4-10 Motor Speed Direction has impact
on the Flying Start in par. 1-73 Flying Start.
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 par. 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 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: Function:
Application
depend-
ent
*
[Applica-
tion
dependant]
Enter the maximum limit for motor
speed. The Motor Speed High Limit can
be set to correspond to the manufactur-
er’s maximum rated motor. The Motor
Speed High Limit must exceed the
setting in par. 4-11 Motor Speed Low
Limit [RPM]. Only par. 4-11 Motor Speed
Low Limit [RPM] or par. 4-12 Motor Speed
Low Limit [Hz] will be displayed depend-
ing on other parameters in the Main
Menu and depending on default
settings dependant on global location.
NOTE
Max. output frequency cannot exceed 10% of the
inverter switching frequency (par. 14-01 Switching
Frequency).
NOTE
Any changes in par. 4-13 Motor Speed High Limit [RPM]
will reset the value in par. 4-53 Warning Speed High to
the same value as set in par. 4-13 Motor Speed High Limit
[RPM].
4-14 Motor Speed High Limit [Hz]
Range: Function:
Application
depend-
ent
*
[Applica-
tion
dependant]
Enter the maximum limit for motor
speed. The Motor Speed High Limit can
be set to correspond to the manufactur-
er’s recommended maximum of the
motor shaft. The Motor Speed High Limit
must exceed the in par. 4-12 Motor
Speed Low Limit [Hz]. Only
par. 4-11 Motor Speed Low Limit [RPM] or
par. 4-12 Motor Speed Low Limit [Hz] will
be displayed depending on other
parameters in the Main Menu and
depending on default settings depend-
ant on global location.
Parameter Description
VLT
®
HVAC Drive Programming Guide
54 MG.11.CA.02 - VLT
®
is a registered Danfoss trademark
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