4.19 Parameters: 22-** Application
Functions
4.19.1 22-4* Sleep Mode
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
.
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.
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:
1.
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 enters boost
status. If
parameter 22-45 Setpoint Boost
is not set,
the frequency converter enters sleep mode.
2.
After
parameter 22-46 Maximum Boost Time
, the
frequency converter ramps the motor speed
down to
parameter 1-82 Min Speed for Function at
.
3.
The frequency converter activates
parameter 1-80 Function at Stop
. The frequency
converter is now in sleep mode.
4.
When the error between reference and feedback
is greater than
parameter 22-44 Wake-Up Ref./FB
Diff
, and the condition lasts more than
parameter 22-41 Minimum Sleep Time
, the
frequency converter is out of sleep mode.
5.
The frequency converter reverts to closed-loop
control.
NOTICE
Sleep mode is not active when local reference is active
(set speed manually with navigation keys on the LCP).
Does not work in
Hand On
mode. Auto set-up in open
loop must be carried out before setting input/output in
closed loop.
22-40 Minimum Run Time
Range:
Function:
10 s
*
[0 - 600 s] Set the desired minimum running time for
the motor after a start command (digital
input or bus) before entering sleep mode.
22-41 Minimum Sleep Time
Range:
Function:
10 s
*
[0 - 600 s] Set the minimum time for staying in sleep
mode. This time overrides any wake-up
conditions.
22-43 Wake-Up Speed [Hz]
Range:
Function:
10
*
[ 0 -
400.0 ]
Only to be used if
parameter 1-00 Configuration
Mode
, is 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
22-44 Wake-Up Ref./FB Diff
Range:
Function:
10 %
*
[0 -
100 %]
Only to be used if
is set for closed loop and the integrated
PI controller is used for controlling the pressure.
Set the pressure drop allowed in percentage of
setpoint for the pressure (P
set
) before cancelling
the sleep mode.
22-45 Setpoint Boost
Range:
Function:
0 %
*
[-100
-
100 %]
Only to be used if
is set for closed loop, and the integrated PI
controller is used. In systems with for example
constant pressure control, it is advantageous to
increase the system pressure before the motor is
stopped. This extends the time in which the motor
is stopped and helps to avoid frequent start/stop.
Set the desired overpressure/temperature in
percentage of setpoint for the pressure (P
set
)/
temperature before entering the sleep mode.
If setting for 5%, the boost pressure is P
set
*1.05.
The negative values can be used for cooling tower
control where a negative change is needed.
Parameter Descriptions
VLT
®
AutomationDrive FC 360
110
Danfoss A/S © 7/2015 All rights reserved.
MG06C602
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