Danfoss vlt aqua Programming Guide

23-84 Cost Savings
Range: Function:
0.00
*
[0 - 0] This parameter allows a readout of the calculation based on the
above equation (in local currency).
2.21. Main Menu - Cascade Controller - Group 25
2.21.1. 25-** Cascade Controller
Parameters for configuring the Basic Cascade Controller for sequence control of multiple pumps.
For a more application oriented description and wiring examples, see section
Application Exam-
ples, Basic Cascade Controller
.
To configure the Cascade Controller to the actual system and the desired control strategy, it is
recommended to follow the below sequence, starting with
System Settings , par. 25-0*, and next
Alternation Settings , par. 25-5*. These parameter can normally be set in advance.
Parameters in
Bandwidth Settings , 25-2*, and Staging settings , 25-4*, will often be dependent
on the dynamic of the system and final adjustment to be done at the commissioning of the plant.
NB!
The Cascade Controller is supposed to operate in closed loop controlled by the built-
in PI controller (Closed Loop selected in
Configuration Mode , par.1-00). If Open
Loop
is selected in Closed Loop , par.1-00, all fixed speed pumps will be destaged,
but the variable speed pump will still be controlled by the frequency converter, now
as an open loop configuration:
VLT
®
AQUA Drive Programming Guide 2. Parameter Description
MG.20.O2.02 - VLT
®
is a registered Danfoss trademark 227
2

Danfoss vlt aqua Specifications

General

Supply Voltage	200-240V, 380-500V, 525-600V
Enclosure	IP20
Features	Energy optimization
Approvals	CE, UL, cUL
Input Voltage Range	200-240V, 380-500V, 525-600V
Output Voltage Range	0 to supply voltage
Protection Features	Overvoltage, Undervoltage, Overcurrent, Short circuit, Ground fault
Communication Interfaces	PROFIBUS
Cooling Method	Air-cooled