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VLT® Flow Drive FC 111
Programming Guide
Table 403: Range:
Min: 0 s
4.16.4.1 Running Sleep Mode in Open Loop
Procedure
1.
The motor speed is less than the speed set in parameter 22-47 Sleep Speed [Hz]. The motor runs longer than the time dura-
tion set in parameter 22-40 Minimum Run Time. The sleep condition lasts longer than the time set in parameter 22-48 Sleep
Delay Time.
2.
The drive ramps the motor speed down to parameter 1-82 Min Speed for Function at Stop [Hz].
3.
The drive activates parameter 1-80 Function at Stop. The drive is now in sleep mode.
4.
The drive compares the speed setpoint with parameter 22-43 Wake-Up Speed [Hz] to detect a wake-up situation.
5.
The speed setpoint is greater than parameter 22-43 Wake-Up Speed [Hz]. The sleep condition has lasted longer than the time
set in parameter 22-41 Minimum Sleep Time. The wakeup condition lasts longer than the time set in parameter 22-49 Wake-
Up Delay 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).
4.16.4.2 Running Sleep Mode in Closed Loop
Procedure
1.
The drive goes into boost status if the following conditions are met.
a.
If parameter 22-02 Sleepmode CL Control Mode is set to [0] Normal:
The motor speed is less than the value in parameter 22-47 Sleep Speed [Hz].
The feedback is above the reference.
The motor runs longer than the time in parameter 22-40 Minimum Run Time.
The sleep condition lasts longer than the time in parameter 22-48 Sleep Delay Time.
b.
If parameter 22-02 Sleepmode CL Control Mode is set to [1] Simplified:
The motor speed is less than the value in parameter 22-47 Sleep Speed [Hz].
The motor runs longer than the time in parameter 22-40 Minimum Run Time.
The sleep condition lasts longer than the time in parameter 22-48 Sleep Delay Time.
c.
If parameter 22-45 Setpoint Boost is not set, the drive goes into sleep mode.
2.
After the time in parameter 22-46 Maximum Boost Time has passed, the drive ramps down the motor speed to the speed in
parameter 1-82 Min Speed for Function at Stop [Hz].
3.
The drive activates parameter 1-80 Function at Stop. The drive is now in sleep mode.
4.
The drive is out of sleep mode when the error between the reference and the feedback is greater than parameter 22-44
Wake-Up Ref./FB Diff, and the sleep time is longer than the time in parameter 22-41 Minimum Sleep Time, and the wake-up
condition lasts longer than the time set in parameter 22-48 Sleep Delay Time.
5.
The drive goes back to closed-loop control.
4.16.5 22-5* End of Curve
End of Curve
The end-of-curve condition occurs when a pump is yielding a large volume to ensure the set pressure. This situation can occur if
there is a leakage in the distribution pipe system after the pump which causes the pump to operate at the end of the pump charac-
teristic. If the feedback is below the setpoint for the required pressure for a set time (parameter 22-51 End of Curve Delay), and the
pump runs with maximum speed set in parameter 4-14 Motor Speed High Limit [Hz], the function selected in parameter 22-50 End of
Curve Function takes place.
It is possible to get a signal on 1 of the digital outputs by selecting [192] End of curve in parameter group 5-3* Digital Outputs and/or
parameter group 5-4* Relays. The signal is present when end-of-curve condition occurs and the selection in parameter 22-50 End of
Curve Function is different from [0] Off.
172 | Danfoss A/S © 2021.07
Max: 3600 s
Default value: 0 s
AU363928304090en-000101 / 130R0982
Parameters
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