Danfoss iC2 Application Manual page 182

Application Guide | iC2-Micro Frequency Converters
Feed Forward (Menu Index 5.12.6)
7.6.11.4
P 5.12.6.1 PID Feed Forward Factor
Use this parameter to enter the PID feed forward factor. The feed forward factor sends a constant fraction of the reference signal
to bypass PID control, so the PID only has an effect on the remaining fraction of the control signal. This function increases dynamic
performance.
Default value:
0
Parameter
738
number:
Data type:
uint16
Sleep Mode (Menu Index 5.12.7)
7.6.11.5
The sequence when running sleep mode in open loop ([1] Speed is selected in P 5.12.7.1 Sleep Mode in Process Closed-
loop Mode)
1.
The motor speed is less than P 5.12.7.8 Sleep Speed [Hz] and the motor has been running longer than P 5.12.7.2 Minimum Run Time.
2.
The drive ramps the motor speed down to P 5.7.2 Min Speed for Function at Stop [Hz].
3.
The drive activates P 5.7.1 Function at Stop. The drive is now in sleep mode.
4.
The drive compares the speed setpoint with P 5.12.7.4 Wake-Up Speed [Hz] to detect wake-up situation.
5.
The speed setpoint is greater than P 5.12.7.4 Wake-Up Speed [Hz] and the sleep condition has lasted for more than P 5.12.7.3
Minimum Sleep Time. The drive is now out of sleep mode.
6.
Go back to speed open loop control (ramp motor speed up to the speed setpoint).
The sequence when running sleep mode in closed loop ([0] Feed. and Speed is selected in P 5.12.7.1 Sleep Mode in
Process Closed-loop Mode)
1.
When the error between reference and feedback is greater than P 5.12.7.5 Wake-Up Reference/Feedback Difference, and the output
speed is less than the sleep mode speed, the drive enters boost status. If P 5.12.7.6 Setpoint Boost is not set, the drive enters sleep
mode.
2.
After P 5.12.7.7 Maximum Boost Time, the drive ramps the motor speed down to P 5.7.2 Min Speed for Function at Stop [Hz].
3.
The drive activates P 5.7.1 Function at Stop. The drive is now in sleep mode.
4.
When the error between reference and feedback is greater than P 5.12.7.5 Wake-Up Reference/Feedback Difference, and the
condition lasts more than P 5.12.7.3 Minimum Sleep Time, the drive is out of sleep mode.
5.
The drive reverts to closed loop control.
The sequence when running sleep mode in closed loop ([2] Feedback is selected in P 5.12.7.1 Sleep Mode in Process
Closed-loop Mode)
1.
When the error between reference and feedback is greater than P 5.12.7.5 Wake-Up Reference/Feedback Difference, the drive enters
boost status. If P 5.12.7.6 Setpoint Boost is not set, the drive enters sleep mode.
2.
After P 5.12.7.7 Maximum Boost Time, the drive ramps the motor speed down to P 5.7.2 Min Speed for Function at Stop [Hz].
3.
The drive activates P 5.7.1 Function at Stop. The drive is now in sleep mode.
4.
When the error between reference and feedback is greater than P 5.12.7.5 Wake-Up Reference/Feedback Difference, and the
condition lasts more than P 5.12.7.3 Minimum Sleep Time, the drive is out of sleep mode.
5.
The drive reverts to closed loop control.
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Parameter type:
Unit:
Access type:
Range (0–200)
%
Read/Write
AB413939445838en-000301 / 130R1254