462
Enhanced Sleep Mode Timer
Value:
Value 0 – 9999 s
0 = OFF
Function:
The timer prevents cycling between sleep mode and
normal operation. If for instance the power consumption
drops below the no/low flow power curve, the adjustable
frequency drive changes mode when the timer expires.
Description of choice:
In case of cycling, set the timer to an appropriate value
that limits the number of cycles.
The value 0 disables enhanced sleep mode.
Note: In
parameter 463 Boost set point
, it is possible to set
up the adjustable frequency drive to provide a pressure
boost before the pump is stopped.
463
Boost setpoint
Value:
1 - 200%
100% of setpoint
Function:
This function can only be used if
Closed loop
has been
selected in
parameter 100 Configuration
.
In systems with constant pressure regulation, it is
advantageous to increase the pressure in the system
before the adjustable frequency drive stops the motor. This
extends the time during which the adjustable frequency
drive stops the motor and helps to avoid frequent starting
and stopping of the motor, e.g. in the case of leaks in the
water supply system.
There is a fixed boost time-out on 30 s if the boost
setpoint cannot be reached.
Description of choice:
Set the required
Boost setpoint
as a percentage of the
resulting reference under normal operation. 100%
corresponds to the reference without boost (supplement).
464
Wakeup Pressure
Value:
Parameter 204 Ref
MIN
– parameter 215 - 218
Setpoint
0
Function:
When in sleep mode, the adjustable frequency drive wakes
up when the pressure is below the wake-up pressure for
the time set in
parameter 462 Enhanced sleep mode timer
.
Description of choice:
Set an appropriate value for the system. The unit is set in
parameter 416 Process units
.
465
Minimum pump frequency
Value:
Value parameter 201 f
MIN
– parameter 202 f
MAX
(Hz)
20
Function:
This parameter is linked to
parameter 467 Minimum Power
and is used for no/low flow power curve.
Description of choice:
Enter a value equal to or close to the desired minimum
frequency set in
parameter 201 Output frequency low limit,
f
MIN
. Note, that the extension of the no/low flow power
curve is limited by
parameters 201 Output frequency low
limit, f
MIN
and
202 Output frequency high limit, f
MAX
and not
by
parameters 465 Minimum pump frequency
and
466
Maximum pump frequency
.
466
Maximum Pump Frequency
Value:
Value parameter 201 f
MIN
- parameter 202 f
MAX
(Hz)
50
Function:
This parameter is linked to
parameter 468 Maximum pump
power
and is used for the no/low flow power curve.
Description of choice:
Enter a value equal to or close to the desired maximum
frequency set in
parameter 202 Output frequency high limit,
f
MAX
.
467
Minimum Pump Power
Value:
0 – 500.000 W
0
Function:
The associated power consumption at the frequency
entered in
parameter 465 Minimum pump frequency
.
Description of choice:
Enter the no/low flow power reading at minimum pump
frequency entered in
parameter 465 Minimum pump
frequency
.
Depending on pump size or curve select
[32] W
or
[8] kW
in
parameter 009 Large display readout
for fine tuning.
468
Maximum Pump Power
Value:
0 – 500.000 W
0
Function:
The associated power consumption at the frequency
entered in
parameter 466 Minimum pump frequency
.
Description of choice:
Enter the no/low flow power reading at maximum pump
frequency entered in
parameter 466 Minimum pump
frequency
.
Programming
Design Guide
MG27E402
Danfoss A/S © Rev. May/2014 All rights reserved.
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