Danfoss VLT AutomationDrive FC 300 Programming Manual page 67

Parameter Descriptions
3.6.2 4-3* Motor Feedback Monitoring
The parameter group includes monitoring and handling of
motor feedback devices as encoders, resolvers etc.
4-30 Motor Feedback Loss Function
3 3
Option:
[0] Disabled
[1] Warning
[2] Trip
*
[3] Jog
[4] Freeze Output
[5] Max Speed
[6] Switch to Open Loop
[7] Select Setup 1
[8] Select Setup 2
[9] Select Setup 3
[10] Select Setup 4
[11] stop & trip
Warning/Alarm 61 Feedback Error is related to the Motor
Feedback Loss Function.
4-31 Motor Feedback Speed Error
Range:
300 RPM [1 - 600 RPM] Select the max allowed tracking error
*
Speed
[rpm]
66
FC 300 Programming Guide
Function:
Select which reaction the frequency
converter should take if a feedback
fault is detected. The selected action
is to take place when the feedback
signal differs from the output speed
where its range is specified in
4-31 Motor Feedback Speed Error
during its time frame set in 4-32 Motor
Feedback Loss Timeout.
Function:
in speed from the calculated and the
actual mechanical shaft output speed.
n
calc
n
actual
P 4-31
P 4-32
MG.33.MB.02 - VLT
4-32 Motor Feedback Loss Timeout
Range:
0.05 s [0.00 - 60.00 s] Set the timeout value allowing the speed
*
4-34 Tracking Error Function
Option:
[0] Disable
*
[1] Warning
[2] Trip
[3] Trip after
stop
Warning/Alarm 78 Tracking Error is related to the Tracking
Error Function.
4-35 Tracking Error
Range:
10 RPM [1 - 600
*
RPM]
4-36 Tracking Error Timeout
Range:
1.00 s [0.00 - 60.00 s] Enter the time-out period during which
*
Time
[sec]
®
is a registered Danfoss trademark
Function:
error set in 4-31 Motor Feedback Speed
Error to be exceeded.
Function:
Select which reaction the frequency converter
should take if a tracking error is detected.
Closed Loop: The tracking error is measured
between the output from the ramp generator
and the speed feedback (filtered).
Open Loop: The tracking error is measured
between the output from the ramp generator -
compensated for slip - and the frequency that is
sent to the motor (16-13 Frequency).
The reaction will be activated if the measured
difference is more than specified in 4-35 Tracking
Error for the time specified in 4-36 Tracking Error
Timeout.
A tracking error in closed loop does not imply
that there is a problem with the feedback signal!
A tracking error can be the result of torque limit
at too big loads.
Function:
Enter the maximum permissible speed error
between the motor speed and the output of
the ramp when not ramping. In open loop
the motor speed is estimated and in closed
loop it is the feedback from encoder/
resolver.
Function:
an error greater than the value set in
4-35 Tracking Error is permissible.