Danfoss VLT AutomationDrive FC 301 Programming Manual page 161

VLT AutomationDrive FC 301/302
Programming Guide
Parameter 4-34 Tracking Error Function
Table 280: Parameter 4-34 Tracking Error Function
4-34 Tracking Error Function
Default value: Size related
Conversion index: –
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 com-
pared 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.
Option
[0]
[1]
[2]
[3]
Warning/Alarm 78, Tracking Error is related to the tracking error function.
Parameter 4-35 Tracking Error
Table 281: Parameter 4-35 Tracking Error
4-35 Tracking Error
Default value: 10 RPM
Conversion index: 67
Enter the maximum allowed 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.
Parameter 4-36 Tracking Error Timeout
Table 282: Parameter 4-36 Tracking Error Timeout
4-36 Tracking Error Timeout
Default value: 1 s
Conversion index: -2
Enter the timeout period during which an error greater than the value set in parameter 4-35 Tracking Error is allowed.
Parameter 4-37 Tracking Error Ramping
Table 283: Parameter 4-37 Tracking Error Ramping
4-37 Tracking Error Ramping
Default value: 100 RPM
Conversion index: 67
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.
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Parameter type: Option
Data type: Uint8
Name
Disable
Warning
Trip
Trip after stop
Parameter type: Range, 1 - 600 RPM
Data type: Uint16
Parameter type: Range, 0 - 60 s
Data type: Uint16
Parameter type: Range, 1 - 600 RPM
Data type: Uint16
Parameter Descriptions
Setup: All setups
Change during operation: True
Description
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
Setup: All setups
Change during operation: True
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