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3.6. Main Menu - Limits/Warnings - Group 4
3.6.1. 4-** Limits and Warnings
Parameter group for configuring limits and warnings.
3.6.2. 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.
NB!
The setting in par.4-10 has impact on the Flying Start in par.1-73.
4-11 Motor Speed Low Limit [RPM]
Range:
Function:
Size related
*
[0 - 60,000 RPM]
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:
Size related
*
[0 - 1000 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 par. 4-14
Motor
Speed High Limit [Hz]
.
4-13 Motor Speed High Limit [RPM]
Range:
Function:
Size related
*
[0 - 60,000 RPM]
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]
. Only par. 4-11 or par. 4-12 will be displayed depending on other parameters set
in the Main Menu and depending on default settings dependant on global geographical location.
NB!
The output frequency value of the frequency converter must not exceed a value higher than 1/10 of the switching frequency.
3. Parameter Description
VLT
®
HVAC Drive Programming Guide
60
MG.11.C5.02 - VLT
®
is a registered Danfoss trademark
3