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2 Parameter Description
2.20 Main Menu - Cascade Controller - Group 25
2.21.1 25-** Cascade Controller
2
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 Examples, 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
par. 25-0*
System Settings
and next par. 25-5*
Bandwidth Settings
Parameters in 25-2*
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
ration Mode
destaged, but the variable speed pump will still be controlled by the frequency converter, now as an open loop configuration:
240
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Alternation Settings
. These parameter can normally be set in advance.
Staging settings
and 25-4*
, will often be dependent on the dynamic of the system and final adjustment to be
Configuration Mode
Open Loop
, par. 1-00
). If
MG.20.W1.22 - VLT is a registered Danfoss trademark
.
Configuration Mode
is selected in par. 1-00
VLT Automation VT Drive FC322
Programming Guide
Configu-
, all fixed speed pumps will be
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