Configuration; Bandwidth Settings - Danfoss VLT AQUA Operating Instructions Manual

Parameter Descriptions
NOTICE
This parameter may be individually set to any value for
maintenance purposes.

5.1.4 Configuration, 27-1*

This parameter group is for configuring the Cascade
Controller option.
27-10 Cascade Controller
Cascade Controller Mode sets the operating mode.
Option:
[0] Disabled
[1] Master/Follower
5 5
[2] Mixed Pumps
[3] Basic Cascade Ctrl
27-11 Number Of Drives
Range:
Size related
*
27-12 No. of Pumps
Range:
0 [0 - No. of Drives] Number of Pumps to be controlled by
*
27-14 Pump Capacity
Range:
100 [ 10 -
% 800 %]
*
27-16 Runtime Balancing
Runtime Balancing sets the priority of each pump for balancing
it's running hours. The pumps with the highest priority will be
operated before the lower prioritised pumps. Pumps with the
same priority are staged/de-staged based on the running hours.
Option:
[0]
[1]
[2]
26
Function:
Function:
[ 1 - 8 ] Number of frequency converters to be
controlled by the Cascade Controller.
MCO 101: 1-6
MCO 102: 1-8
Function:
the Cascade Controller.
MCO 101: 0-6
MCO 102: 0-8
Function:
Pump Capacity sets the capacity of each
pump in the system relative to the first pump.
This is an indexed parameter with one entry
per pump. The capacity of the first pump is
always considered to be 100%.
Function:
Balanced Priority 1 Turned on first, turned off
last.
Balanced Priority 2 Turned on if no priority 1
pumps are available. Turned
off before priority 1 pumps
are turned off.
Spare Pump Turned on last, turned off
first.
MI38C402 - VLT
®
VLT AQUA Drive MCO 101/MCO 102
27-17 Motor Starters
Option:
[0] Direct
Online
[1] Soft
Starter
[2] Star/Delta Adds a delay at staging, controlled by
27-18 Spin Time for Unused Pumps
Range:
Size
related
*
CAUTION
Setting this parameter too high may cause overpressure
to some systems.
27-19 Reset Current Runtime Hours
Reset Current Runtime Hours is used to reset all Current Runtime
Hours to zero. This time is used for runtime balancing.
Option:
[0]
[1]

5.1.5 Bandwidth Settings, 27-2*

Parameters for configuring control response.
27-20 Normal Operating Range
Range:
Size
related
*
®
is a registered Danfoss trademark
Function:
Motor Starters selects the type of mains starters
used on the fixed speed pumps. All fixed speed
pumps must be configured the same. Possible
choices are:
Adds a delay when staging and de-staging
corresponding to the soft-starter ramp time, see
parameter 27-41 and 27-42.
27-42 Ramp Up Delay.
Function:
[ 0 - Spin Time for Unused Pumps sets the
99 s] length of time to spin unused pumps. If a
fixed speed pump has not been run in the
last 72 hours, it will be turned on for this
time. This is to prevent damage caused by
leaving the pump off too long. The spin
feature may be disabled by setting the
value of this parameter to 0.
Function:
Do not reset
Do reset
Function:
[ 1 - Normal Operating Range is the allowed offset
100 %] from the set-point before a pump may be
added or removed. The system must be
outside this limit for the time specified in
27-23 Staging Delay or 27-24 Destaging Delay
before a cascade operation takes place.
Normal refers to the system operating with at
least one variable speed pump available. This
value is entered as a % of Max Reference, see
21-12 Ext. 1 Maximum Reference in the VLT
AQUA Drive Programming Guide for further
information.
®