Speed Monitor - Danfoss VLT AutomationDrive FC 301 Programming Manual

Programming Guide | VLT® AutomationDrive FC 301/FC 302
Enter the maximum allowed speed error between the motor speed and the output of the ramp when ramping. In open loop, the motor
speed is estimated and in closed loop, the encoder measures the speed.
4-38 Tracking Error Ramping Timeout
Default value: 1 s
Setup: All setups
Data type: Uint16
Enter the timeout period during which an error greater than the value set in parameter 4-37 Tracking Error Ramping while ramping is
allowed.
4-39 Tracking Error After Ramping Timeout
Default value:
5 s
Setup: All setups
Data type:
Uint16
Enter the timeout period after ramping where parameter 4-37 Tracking Error Ramping and parameter 4-38 Tracking Error Ramping
Timeout are still active.

4-4* Speed Monitor

6.6.4
4-43 Motor Speed Monitor Function
Default value: –
Setup: All setups
Data type: Uint8
This parameter is only available in the flux control principle.
Select how the drive reacts when the motor speed monitor-function detects overspeed or wrong rotation direction. When the motor
speed monitor is active, the drive detects an error if the following conditions are true for a time period specified in parameter 4-45 Motor
Speed Monitor Timeout:
The actual speed differs from the reference speed in parameter 16-48 Speed Ref. After Ramp [RPM].
l
The difference between the speeds exceeds the value in parameter 4-44 Motor Speed Monitor Max.
l
In speed closed loop, the actual speed is the feedback from the encoder measured during the time defined in parameter 7-06 Speed PID
Lowpass Filter Time. In open loop, the actual speed is the estimated motor speed.
Speed
nRef
0rpm
-nRef
Figure 62: Speed Reference and Maximum Allowed Speed Difference
© 2024.09
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Conversion index:
Change during operation:
NOTICE
Time
Parameter Descriptions
Range, 0 - 60 s
-2
True
Range, 0 - 60 s
-2
True
Option
–
True
AU275636650261en-003201 / 130R0334 | 185