Danfoss VLT FC 102 Programming Manual page 551

Programming Guide | VLT® HVAC Drive FC 102
24-98 Locked Rotor Coefficient 3
Default value: 0
Setup: All setups
Data type: Int32
Enter the linear coefficient of the locked-rotor detection function multiplied by 1000.
24-99 Locked Rotor Coefficient 4
Default value: 0
Setup:
All setups
Data type: Int32
Enter the constant coefficient of the locked-rotor detection function multiplied by 1000.
Parameter Group 25-** Cascade Controller
6.25
Introduction to Cascade Controller Parameters
6.25.1
Parameters for configuring the basic cascade controller for sequence control of multiple pumps. For a more application-oriented
description and wiring examples, see the section Application Examples, Cascade Controller in the design guide.
To configure the cascade controller to the actual system and the required control strategy, follow the 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 groups 25-2* Bandwidth Settings and 25-4* Staging Settings often depend on the dynamic of the system and final
adjustment to be done at the commissioning of the plant.
The cascade controller is supposed to operate in closed loop controlled by the built-in PI controller ([3] Closed loop selected in
parameter 1-00 Configuration Mode). If [0] Open loop is selected in parameter 1-00 Configuration Mode, all fixed-speed pumps
are destaged, but the variable-speed pump is still controlled by the drive, now as an open-loop configuration.
© 2024.10
Parameter type:
Conversion index:
Change during operation:
Parameter type:
Conversion index:
Change during operation:
NOTICE
Parameter Descriptions
Range, -100 - 100
-4
True
Range, -500 - 500
-3
True
AU430028034214en-001901 / 130R0310 | 551