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

Product Features
Pipe fill mode comprises functionalities to fill
pipes smoothly and avoid water hammering. This
feature provides different modes for horizontal
and vertical pipes.
•
Real time clock
•
Smart logic control (SLC)
SLC comprises programming of a sequence
consisting of events and actions. SLC offers a
wide range of PLC functions using comparators,
logic rules, and timers.
•
Pre/post Lube
5 5
See chapter 5.7 Pre/post Lube Overview for details.
•
Flow confirmation
See chapter 5.8 Flow Confirmation Overview for
details.
•
Advanced minimum speed monitoring for
submersible pumps
See chapter 5.9 Advanced Minimum Speed
Monitoring Overview for details.
•
Preventive maintenance
The preventive maintenance feature enables
programming of scheduled service intervals into
the drive.
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.
•
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:
•
Special ramps (initial/final ramp, check valve
ramp).
•
Sleep mode.
•
Deragging.
•
Dry-run detection.
•
End of curve detection.
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VLT® AQUA Drive FC 202
•
•
•
•

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
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.
The following options for cascade control are available for
the VLT
•
•
•
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:
•
•
Danfoss A/S © 05/2017 All rights reserved.
Flow compensation.
Pipe fill mode for horizontal, vertical, and mixed
pipe systems.
Control performance.
Minimum speed monitor.
Extended Cascade Controller MCO 101 and VLT
®
AQUA Drive:
Built-in BASIC cascade controller (standard
cascade controller).
MCO 101 (extended cascade controller).
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.
®
®
MG22B102