27-44 Destaging Threshold
Range:
Function:
LCP, then the new values are used, but are
continuously automatically tuned.
e30bd076.12
Motor speed
high
Motor speed
low
Destaging
speed
Variable speed
pump
Fixed speed pump
Closed loop
Monitor feedback and
change to closed loop if
Time
(27-44)
setpoint is reached
Illustration 3.108 Destaging Threshold
27-45 Staging Speed [RPM]
Range:
Function:
0 RPM
*
[0 - 0 RPM] Shows the actual staging speed based on
the staging threshold.
27-46 Staging Speed [Hz]
Range:
Function:
0 Hz
*
[0 - 0 Hz] Shows the actual staging speed based on the
staging threshold.
27-47 Destaging Speed [RPM]
Range:
Function:
0 RPM
*
[0 - 0 RPM] Shows the actual destaging speed based
on the destaging threshold.
27-48 Destaging Speed [Hz]
Range:
Function:
0 Hz
*
[0 - 0 Hz] Shows the actual destaging speed based on
the destaging threshold.
3.24.9 27-5* Alternation Settings
Parameters for configuring the alternation settings.
27-51 Alternation Event
Select
option [1] At Destage
to enable alternation at destaging.
Option:
Function:
[0]
Off
[1]
At Destage
27-52 Alternation Time Interval
Range:
Function:
0 min
*
[0 -
10080
min]
Enter the time between alternations. Disable
the alternation by entering the value 0.
Parameter 27-53 Alternation Timer Value
shows the time remaining until the next
alternation occurs.
27-53 Alternation Timer Value
Range:
Function:
0 min
*
[0 - 10080
min]
Shows the time remaining before an
interval-based alternation occurs.
Parameter 27-52 Alternation Time Interval
defines the time interval.
27-54 Alternation At Time of Day
Enable alternating pumps at a specific time of day. The time is
set in
parameter 27-55 Alternation Predefined Time
. This parameter
requires the real-time clock.
Option:
Function:
[0]
*
Disabled
[1]
Enabled
27-55 Alternation Predefined Time
Range:
Function:
Size
related
*
[ 0 -
0 ]
Enter the time of day for pump alternation.
This parameter is only available if
parameter 27-54 Alternation At Time of Day
is
set to
option [1] Enabled
.
27-56 Alternate Capacity is <
Range:
Function:
0 %
*
[0 -
100 %]
This parameter ensures that the lead pump is
operating at a speed lower than a certain value
before the time-based alternation takes place.
This ensures that alternation only takes place
when the interruption in operation does not
affect the quality of the process and minimizes
the system disturbance caused by alternations.
The value is a percentage of the capacity of
pump 1. Setting this parameter to 0% disables it.
27-58 Run Next Pump Delay
Range:
Function:
0.1 s
*
[0.1 - 5 s] Enter the delay between stopping the current
lead pump and starting the next lead pump
when alternating lead pumps. This parameter
gives the contactors time to switch while both
pumps are stopped.
(27-58)
130BA597.11
Illustration 3.109 Run Next Pump Delay
Parameter Description
VLT
®
AQUA Drive FC 202
230
Danfoss A/S © 05/2018 All rights reserved.
MG20OB02
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Summary of Contents for VLT AQUA Drive FC 202
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