NOTICE
All frequency converters must have the same power
range. All variable speed pumps must be of the same
size. Fixed speed pumps may be of different sizes. See
.
100%
100%
200%
200%
e30ba593.12
Rela
y 1
Rela
y 2
Rela
y 10
1
2
1
2
3
4
Illustration 3.96 Mixed Pump Configuration
3.24.3 Unequal Pump Size Configuration
The unequal pump size configuration supports a limited
mix of fixed speed pumps in different sizes. This configu-
ration provides the largest range of system output with the
smallest number of pumps.
3.24.4 Using Soft Starters for Fixed Speed
Pumps
In a mixed pump configuration, contractors can be
replaced with soft starters.
NOTICE
Mixing soft starters and contactors hinders the control of
output pressure during the staging and destaging
transitions. The use of soft starters delays staging due to
the ramp time of a fixed speed pump.
27-01 Pump Status
Shows the status of each pump in the system.
Option:
Function:
[0]
*
Ready
The pump is available for use by the
Cascade Controller.
[1]
On Drive
The pump is:
•
Running.
•
Connected to the frequency
converter.
•
Controlled by the Cascade
Controller.
[2]
On Mains
The pump is:
•
Running.
•
Connected to mains.
•
Controlled by the Cascade
Controller.
[3]
Offline - Off
The pump is off and not available for use
by the Cascade Controller.
[4]
Offline - On
Mains
The pump is:
•
Running.
•
Connected to mains.
•
Not available for use by the
Cascade Controller.
[5]
Offline - On
Drive
The pump is:
•
Running.
•
Connected to the frequency
converter.
•
Not available for use by the
Cascade Controller.
[6]
Offline - Fault
The pump is:
•
Running.
•
Connected to mains.
•
Not available for use by the
Cascade Controller.
[7]
Offline - Hand
The pump is:
•
Running.
•
Connected to mains.
•
Not available for use by the
Cascade Controller.
[8]
Offline -
External
Interlock
The pump is off and is externally
interlocked.
[9]
Spinning
The Cascade Controller is executing a
spin cycle of the pump.
[10] No Relay
Connection
The pump is not directly connected to
the frequency converter, and a relay is
not assigned to the pump.
Parameter Description
VLT
®
AQUA Drive FC 202
224
Danfoss A/S © 05/2018 All rights reserved.
MG20OB02
3
3
Summary of Contents for VLT AQUA Drive FC 202
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