Danfoss VLT AutomationDrive FC 300 Series Programming Manual page 69

Parameter Descriptions
4-30 Motor Feedback Loss Function
Option:
[0] Disabled
[1] Warning
[2] Trip
*
3 3
[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 90 is active as soon as the value in 4-31 Motor
Feedback Speed Error is exceeded, regardless of the setting
of 4-32 Motor Feedback Loss Timeout. 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 error in speed
*
Speed
[rpm]
Illustration 3.31
4-32 Motor Feedback Loss Timeout
Range:
0.05 s [0.00 - 60.00 s] Set the timeout value allowing the
*
4-34 Tracking Error Function
Option:
68
VLT
Function:
Function:
(output speed vs. feedback).
n
calc
n
actual
P 4-31
P 4-32
Function:
speed error set in 4-31 Motor Feedback
Speed Error to be exceeded.
Function:
Select which reaction the should take if a
tracking error is detected.
MG33ME02 - VLT
®
AutomationDrive Programmming Guide
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]
Time
4-37 Tracking Error Ramping
[sec]
Range:
100 RPM
*
RPM]
4-38 Tracking Error Ramping Timeout
Range:
1.00 s [0.00 - 60.00
*
s]
®
is a registered Danfoss trademark
Function:
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:
Enter the time-out period during which
an error greater than the value set in
4-35 Tracking Error is permissible.
Function:
[1 - 600 Enter the maximum permissible 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 it is the feedback
from encoder/resolver.
Function:
Enter the time-out period during which
an error greater than the value set in
4-37 Tracking Error Ramping while
Ramping is permissible.