Danfoss VLT CDS302 User Manual

6.14 Parameters: 25-** Cascade Controller
Parameters for configuring the Basic Cascade Controller for
sequence control of multiple compressors.
Illustration 6.25 Cascade Controller Feedback Signals
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, and next parameter group 25-5*
Alternation Settings. These parameters can normally be set
in advance.
Parameters in parameter group 25-2* Bandwidth Settings
and 25-4* Staging settings will often be dependent on the
dynamic of the system and final adjustment to be done at
the commissioning of the plant.
NOTE
The Cascade Controller is supposed to operate in closed
loop controlled by the built-in PI controller ([1] Speed
Closed Loop selected in 1-00 Configuration Mode). If [0]
Speed Open Loop is selected in 1-00 Configuration Mode, all
fixed speed compressors will be destaged, but the variable
speed compressor will still be controlled by the frequency
converter, now as an open loop configuration:
Parameter Descriptions
Operating Instructions VLT
®
CDS302 and CDS303
MG34M302 - VLT
®
is a registered Danfoss trademark/Commercial Compressor 107
6
6

Danfoss VLT CDS302 Specifications

General

Brand	Danfoss
Model	VLT CDS302
Category	DC Drives
Language	English