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

3 Parameter Description

3.23 Main Menu - Cascade Controller - Group 25

3.23.1 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 Chapter Application Examples, item Basic Cascade Controller
3
To configure the Cascade Controller to the actual system and the desired control strategy, it is recommended to follow the below sequence, starting with
parameter group 25-0* System Settings
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
and next parameter group 25-5*
Staging settings
and 25-4*
, par. 1-00 Configuration Mode ). If Open Loop
MG.11.C9.02 - VLT
in the Design Guide.
Alternation Settings . These parameter can normally be set in advance.
, will often be dependent on the dynamic of the system and final adjustment to be
is selected in par. 1-00 Configuration Mode
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VLT HVAC Drive Programming Guide
, all fixed speed pumps will be
Configu-