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:
Function:
[0]
Disabled
[1]
Master/Follower
[2]
Mixed Pumps
[3]
Basic Cascade Ctrl
27-11 Number Of Drives
Range:
Function:
Size related
*
[ 1 - 8 ] Number of frequency converters to be
controlled by the Cascade Controller.
MCO 101: 1-6
MCO 102: 1-8
27-12 No. of Pumps
Range:
Function:
0
*
[0 - No. of Drives] Number of Pumps to be controlled by
the Cascade Controller.
MCO 101: 0-6
MCO 102: 0-8
27-14 Pump Capacity
Range:
Function:
100
%
*
[ 10 -
800 %]
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%.
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:
Function:
[0]
Balanced Priority 1
Turned on first, turned off
last.
[1]
Balanced Priority 2
Turned on if no priority 1
pumps are available. Turned
off before priority 1 pumps
are turned off.
[2]
Spare Pump
Turned on last, turned off
first.
27-17 Motor Starters
Option:
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:
[0] Direct
Online
[1] Soft
Starter
Adds a delay when staging and de-staging
corresponding to the soft-starter ramp time, see
parameter 27-41 and 27-42.
[2] Star/Delta Adds a delay at staging, controlled by
27-42 Ramp Up Delay
.
27-18 Spin Time for Unused Pumps
Range:
Function:
Size
related
*
[ 0 -
99 s]
Spin Time for Unused Pumps sets the
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.
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:
Function:
[0]
Do not reset
[1]
Do reset
5.1.5 Bandwidth Settings, 27-2*
Parameters for configuring control response.
27-20 Normal Operating Range
Range:
Function:
Size
related
*
[ 1 -
100 %]
Normal Operating Range is the allowed offset
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.
Parameter Descriptions
VLT
®
AQUA Drive MCO 101/MCO 102
26
MI38C402 - VLT
®
is a registered Danfoss trademark
5
5
