Cascade Control Overview - Danfoss VLT AQUA Drive FC 202 Design Manual

Product Features
5.3.1 Easy Set Up
SmartStart
With the SmartStart wizard, it is now easier and more cost-
efficient to commission the drive. SmartStart is activated at
the first power up or after a factory reset and guides users
through a series of easy steps to ensure the correct and
most efficient motor control. The SmartStart can also be
started directly via the quick menu.
•
5 5
Single pump/motor in open or closed loop.
•
Motor alternation: When 2 motors share 1 drive.
•
Basic cascade control: Speed control of a single
pump in a multi-pump system.
•
Master-slave: Control up to 8 drives and pumps
to ensure smooth operation of the overall pump
system.
Quick Menu
The quick menu entry water and pumps provides quick
access to the most common water and pump features of
®
the VLT AQUA Drive FC 202:
•
Special ramps (initial/final ramp, check valve
ramp).
•
Sleep mode.
•
Deragging.
•
Dry-run detection.
•
End of curve detection.
•
Flow compensation.
•
Pipe fill mode for horizontal, vertical, and mixed
pipe systems.
•
Control performance.
•
Minimum speed monitor.

5.4 Cascade Control Overview

The cascade controller options extend the number of
available relays. Once 1 of the options is installed, the
cascade controller functions are managed through the
control panel.
®
VLT Extended Cascade Controller MCO 101 and VLT
Advanced Cascade Controller MCO 102 are add-on options
extending the supported number of pumps and the
functionalities of the built-in cascade controller in the VLT
AQUA Drive FC 202.
The following options for cascade control are available:
•
Built-in BASIC cascade controller (standard
cascade controller).
•
MCO 101 (extended cascade controller).
26
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VLT AQUA Drive FC 202
•
For more information, see chapter 12 Application Examples
and the programming guide.
The extended cascade controller can be used in 2 different
modes:
•
•
MCO 101 allows up to 5 relays for cascade control. MCO
102 allows controlling a total of 8 pumps. The options are
able to alternate the lead pump with 2 relays per pump.
NOTICE!
If MCO 102 is installed, the VLT
extend the number of relays to 13.
Application
Cascade control is a common control system used to
control parallel pumps or fans in an energy-efficient way.
The cascade controller option enables control of multiple
pumps configured in parallel by:
•
•
When using cascade controllers, the individual pumps are
turned on (staged) automatically and turned off (destaged)
as needed to satisfy the required system output for flow or
pressure. The speed of pumps connected to the VLT
AQUA Drive FC 202 is also controlled to provide a
continuous range of system output.
Designated use
The cascade controller options are designed for pump
applications, however, it is also possible to use cascade
controllers in any application requiring multiple motors
configured in parallel.
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Danfoss A/S © 01/2018 All rights reserved.
MCO 102 (advanced cascade controller).
With the extended features controlled by
parameter group 27-** Cascade CTL Option.
Extends the number of available relays for the
basic cascade controlled by parameter group 25-**
Cascade Controller.
®
Relay Card MCB 105 can
Automatically turning individual pumps on/off.
Controlling the speed of the pumps.
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MG22B222