Main Menu - Cascade Controller - Group - Danfoss VLT AQUA Programming Manual

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VLT AQUA Drive Programming Guide
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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
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
Alternation Settings
Parameters in
on the dynamic of the system and final adjustment to be done at the commissioning of the plant.
Function:
[0 - 0] This parameter allows a readout of the calculation based on the
above equation (in local currency).
.
, par. 25-5*. These parameter can normally be set in advance.
Bandwidth Settings
, 25-2*, and
NB!
The Cascade Controller is supposed to operate in closed loop controlled by the built-
in PI controller (Closed Loop selected in
Loop Closed Loop
is selected in
but the variable speed pump will still be controlled by the frequency converter, now
as an open loop configuration:
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MG.20.O2.02 - VLT is a registered Danfoss trademark
System Settings
Staging settings
, 25-4*, will often be dependent
Configuration Mode
, par.1-00, all fixed speed pumps will be destaged,
2. Parameter Description
Application Exam-
, par. 25-0*, and next
Open
, par.1-00). If
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