Danfoss VLT DriveMotor FCP 106 Programming Manual page 109

Parameters
22-27 Dry Pump Delay
Range: Function:
10 s [0 - 600 Defines for how long the dry-pump condition
*
s] must be active before activating a warning or
an alarm.
The frequency converter waits for the no-flow
delay time (parameter 22–24 No-Flow Delay) to
expire before the timer for the dry-pump delay
starts.
4.16.2 22-3* No-flow Power Tuning
If auto set-up is disabled in parameter 22-20 Low Power
Auto Set-up, the tuning sequence is:
1. Close the main valve to stop flow.
2. Run with motor until the system has reached
normal operating temperature.
3. Press [Hand On] and adjust speed for approxi-
mately 85% of rated speed. Note the exact speed.
4. Read power consumption either by looking for
actual power in the data line in the LCP or by
viewing 1 of the following parameters:
4a Parameter 16-10 Power [kW].
or
4b Parameter 16-11 Power [hp] in the Main
Menu.
Note the power readout.
5. Change speed to approximately 50% of rated
speed. Note the exact speed.
6. Read power consumption either by looking for
actual power in the data line in the LCP or by
viewing 1 of the following parameters:
6a Parameter 16-10 Power [kW].
or
6b Parameter 16-11 Power [hp] in the Main
Menu.
Note the power readout.
7. Program the speeds used in:
7a Parameter 22-32 Low Speed [RPM].
7b Parameter 22-33 Low Speed [Hz].
7c Parameter 22-36 High Speed [RPM].
7d Parameter 22-37 High Speed [Hz].
8. Program the associated power values in:
8a Parameter 22-34 Low Speed Power [kW].
8b Parameter 22-35 Low Speed Power [HP].
8c Parameter 22-38 High Speed Power [kW].
MG03N202
Programming Guide
9.
NOTICE
Set parameter 1-03 Torque Characteristics before tuning
takes place.
22-38 High Speed Power [kW]
Range:
Size
related
*
4.16.3 22-4* Sleep Mode
The purpose of sleep mode is to allow the frequency
converter to stop itself in situations where the system is in
balance. This function saves energy, and keeps the system
from being over-satisfied (excessive pressure, water
excessively cooled in cooling towers, building pressuri-
zation problems). This is also important as some
applications prevent the frequency converter from
adjusting motor down to low speed. This might damage
pumps, cause insufficient lubrication in gearboxes, and
make fans unstable.
The sleep controller has 2 important functions: The ability
to go to sleep at right time; and the ability to come out of
a sleep mode at right time. The goal is to keep the
frequency converter in sleep mode as long as possible to
avoid cycling the motor on and off frequently, and, at the
same, time keep the controlled system variable within the
acceptable range.
The sequence when running sleep mode in open loop:
1.
2.
3.
4.
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8d Parameter 22-39 High Speed Power [HP].
Switch back with [Auto On] or [Off].
Function:
[ 0 - To be used, if parameter 0-03 Regional
5.50 Settings is set for [0] International
kW] (parameter not visible if [1] North America is
selected).
Set power consumption at 85% speed level.
This function is used for storing values
necessary to tune no-flow detection.
The motor speed is less than the speed set in
parameter 22-47 Sleep Speed [Hz]. The motor runs
longer than the time duration set in
parameter 22-40 Minimum Run Time. The sleep
condition lasts longer than the time set in
parameter 22-48 Sleep Delay Time.
The frequency converter ramps the motor speed
down to parameter 1-82 Min Speed for Function at
Stop [Hz].
The frequency converter activates
parameter 1-80 Function at Stop. The frequency
converter is now in sleep mode.
The frequency converter compares the speed
setpoint with parameter 22-43 Wake-Up Speed [Hz]
to detect a wake-up situation.
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