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Programming
While the frequency converter has stopped the motor in
sleep mode, a theoretical output frequency is calculated
on the basis of the reference signal. When the theoretical
output frequency rises above the frequency in parameter
407 Wake up frequency, the frequency converter will restart
the motor and the output frequency will ramp up to the
3
3
reference.
In systems with constant pressure regulation, it is
advantageous to provide extra pressure to the system
before the frequency converter stops the motor. This
extends the time during which the frequency converter
has stopped the motor and helps to avoid frequent
starting and stopping of the motor, e.g. in the case of
system leaks.
If 25% more pressure is required before the frequency
converter stops the motor, parameter 406 Boost setpoint is
set to 125%.
Parameter 406 Boost setpoint is only active in Closed loop.
NOTICE
In highly dynamic pumping processes, it is
recommended to switch off the Flying Start function
(parameter 445).
Illustration 3.22
403
Sleep mode timer
Value:
0 - 300 s (301 s = OFF)
Function:
This parameter enables the frequency converter to stop
the motor if the load on the motor is minimal. The timer in
parameter 403 Sleep mode timer starts when the output
frequency drops below the frequency set in parameter 404
Sleep frequency.
When the time set in the timer has expired, the frequency
converter will turn off the motor.
The frequency converter will restart the motor, when the
theoretical output frequency exceeds the frequency in
parameter 407 Wake up frequency.
54
®
VLT
DriveMotor FCM Series
Description of choice:
Select Off if this function is not wanted. Set the threshold
value that is to activate Sleep mode after the output
frequency has fallen below parameter 404 Sleep frequency.
404
Value:
000,0- par. 407 Wake up frequency
Function:
When the output frequency falls below the preset value,
the timer will start the time count set in parameter 403
Sleep mode. The present output frequency will follow the
theoretical output frequency until f
Description of choice:
Set the required frequency.
405
Value:
Manual reset (manual RESET)
Automatic reset x 1 (AUTOMATIC X 1)
Automatic reset x 2 (AUTOMATIC X 2)
Automatic reset x 3 (AUTOMATIC X 3)
Automatic reset x 4 (AUTOMATIC X 4)
Automatic reset x 5 (AUTOMATIC X 5)
Automatic reset x 6 (AUTOMATIC X 6)
Automatic reset x 7 (AUTOMATIC X 7)
Automatic reset x 8 (AUTOMATIC X 8)
Automatic reset x 9 (AUTOMATIC X 9)
Automatic reset x 10 (AUTOMATIC X 10)
Reset at power-up (RESET AT POWER UP)
Function:
This parameter makes it possible to select the reset
function desired after tripping.
After reset, the FC motor can be restarted after 1.5 s.
Description of choice:
If [0] Manual reset is selected, reset must be effected via
the digital inputs.
If the FC motor is to carry out an automatic reset (max.
OFF
1-10 times within 10 minutes) after tripping, select data
value [1]-[10].
406
Value:
1 - 200 %
Function:
This function can only be used if Closed loop has been
selected in parameter 100.
In Systems with constant pressure regulation, it is
advantageous to increase the pressure in the System
before the frequency converter stops the motor. This
extends the time during which the frequency converter
stops the motor and helps to avoid frequent starting and
®
MG03BA02 - VLT
is a registered Danfoss trademark
Sleep frequency
is reached.
MIN
Reset function
Boost setpoint
0,0 Hz
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
100 % of setpoint
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