Danfoss VLT AutomationDrive FC 301 Programming Manual page 108

Parameter Descriptions
Speed
[rpm]
3 3
Illustration 3.31 Motor Feedback Speed Error
4-32 Motor Feedback Loss Timeout
Range:
Size
related
*
4-34 Tracking Error Function
Option:
[0] Disable
[1] Warning
106
n
calc
n
actual
P 4-31
P 4-32
Function:
[0 - 60 s] Set the timeout value allowing the
speed error set in
parameter 4-31 Motor Feedback
Speed Error to be exceeded before
enabling the function selected in
parameter 4-30 Motor Feedback Loss
Function.
Function:
This function is used to monitor
that the application follows the
expected speed profile. In closed
loop, the speed reference to the
PID is compared to the encoder
feedback (filtered). In open loop,
the speed reference to the PID is
compensated for slip and compared
to the frequency that is sent to the
motor (parameter 16-13 Frequency).
The reaction is activated if the
measured difference is more than
the value specified in
parameter 4-35 Tracking Error for the
time specified in
parameter 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 heavy loads.
Danfoss A/S © 10/2019 All rights reserved.
®
VLT AutomationDrive FC 301/302
4-34 Tracking Error Function
Option:
[2]
[3]
Warning/Alarm 78, Tracking Error is related to the tracking
error function.
4-35 Tracking Error
Range:
10 RPM
*
Time
[sec]
4-36 Tracking Error Timeout
Range:
1 s
*
4-37 Tracking Error Ramping
Range:
100 RPM
4-38 Tracking Error Ramping Timeout
Range:
1 s
*
4-39 Tracking Error After Ramping Timeout
Range:
5 s
*
Function:
Trip
Trip after stop
Function:
[1 - 600 Enter the maximum allowed speed
RPM] 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:
[0 - 60 s] Enter the timeout period during
which an error greater than the
value set in parameter 4-35 Tracking
Error is allowed.
Function:
[1 - 600 Enter the maximum allowed speed
*
RPM] 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.
Function:
[0 - 60 s] Enter the timeout period during
which an error greater than the
value set in parameter 4-37 Tracking
Error Ramping while ramping is
allowed.
Function:
[0 - 60 s] Enter the timeout period after
ramping where
parameter 4-37 Tracking Error
Ramping and
parameter 4-38 Tracking Error
Ramping Timeout are still active.
M0013101