Main Menu - Application Functions - Group - Danfoss VLT DriveMotor FCP 106 Programming Manual

Parameters
4.15 Main Menu - Application Functions -
Group 22
4.15.1 22-01 Power Filter Time
22-01 Power Filter Time
Range: Function:
0.50 s [0.02 - 10 s] Set the time constant for the filtered
*
power readout. A higher value gives a
more steady readout, but a slower system
response to changes.
4.15.2 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, that is "satisfied". This saves energy, and keeps
system from being "over-satisfied" (excessive pressure,
water excessively cooled in cooling towers, building
pressurisation 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 in
acceptable range.
The sequence when running sleep mode in Open Loop:
1. The motor speed is less than
parameter 22-47 Sleep Speed [Hz] and the motor
has been running longer than
parameter 22-40 Minimum Run Time.
2. The frequency converter ramps the motor speed
down to parameter 1-82 Min Speed for Function at
Stop [Hz].
3. The frequency converter activates
parameter 1-80 Function at Stop. The frequency
converter is now in sleep mode.
4. The frequency converter compares the speed
setpoint with parameter 22-43 Wake-Up Speed [Hz]
to detect wake up situation.
5. The speed setpoint is greater than
parameter 22-43 Wake-Up Speed [Hz] and the
sleep condition has last for more than
parameter 22-41 Minimum Sleep Time. The
frequency converter is now out of sleep mode.
®
VLT DriveMotor FCP 106 and FCM 106 Programming Guide
6.
The sequence when running sleep mode in Closed Loop:
1.
2.
3.
4.
5.
NOTICE
Sleep Mode is not active when Local Reference is active
(set speed manually by means of navigation keys on the
LCP).
Does not work in Hand-mode. Auto set-up in open loop
must be carried out before setting input/output in closed
loop.
22-40 Minimum Run Time
Range:
10 s
*
22-41 Minimum Sleep Time
Range:
10 s
*
22-43 Wake-Up Speed [Hz]
Range:
10 [ 0 - 400.0 ] Only to be used if 1-00 Configuration Mode, is
*
MG03N102 - Rev. 2013-12-02
Go back to speed open loop control (ramp motor
speed up to the speed setpoint).
If parameter 20-81 PI Normal/ Inverse Control = [0]
Normal. When error between Reference and
Feedback is greater than parameter 22-44 Wake-
Up Ref./FB Diff, the frequency converter goes to
Boost status. If parameter 22-45 Setpoint Boost is
not set, the frequency converter goes into sleep
mode.
After parameter 22-46 Maximum Boost 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.
When error between Reference and Feedback is
greater than parameter 22-44 Wake-Up Ref./FB Diff,
and the condition last more than
parameter 22-41 Minimum Sleep Time, the
frequency converter is out of sleep mode.
The frequency converter goes back to Close Loop
control.
Function:
[0 - 600 s] Set the desired minimum running time for
the motor after a start command (digital
input or Bus) before entering Sleep Mode.
Function:
[0 - 600 s] Set the desired Minimum Time for staying in
Sleep Mode. This overrides any wake up
conditions.
Function:
set for Open Loop and speed reference is
applied by an external controller. Set the
reference speed at which the Sleep Mode
should be deactivated
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