Main Menu - Application Functions - Group - Danfoss VLT AQUA FC 200 Series Programming Manual

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VLT AQUA Drive Programming Guide

2.19 Main Menu - Application Functions - Group 22

2.19.1 22-** Miscellaneous
This group contains parameters used for monitoring water/ wastewater applications.
22-00 External Interlock Delay
Range:
0 s* [0 - 600 s]
2.19.2 No-Flow Detection, 22-2*
The VLT AQUA Drive includes functions for detecting if the load conditions in the system allow the motor to be stopped:
*Low Power Detection
*Low Speed Detection
One of these two signals must be active for a set time (No Flow Delay par. 22-24) before selected action takes place. Possible actions to select (par.
22-23): No action, Warning, Alarm, Sleep Mode.
No Flow Detection:
This function is used for detecting a no flow situation in pump systems where all valves can be closed. Can be used both when controlled by the integrated
PI controller in VLT AQUA Drive or an external PI controller. Actual configuration must be programmed in par. 1-00,
Configuration mode for
- Integrated PI Controller: Closed Loop
- External PI Controller: Open Loop
Carry out No Flow tuning before setting the PI controller parameters!
Function:
Only relevant if one of the digital inputs in par. 5-1* has been programmed for
[7]. The External Interlock Timer will introduce a delay after the signal has been removed from the
digital input programmed for External Interlock, before reaction takes place.
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MG.20.O4.02 - VLT is a registered Danfoss trademark
2 Parameter Description
External Interlock
Configuration Mode
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2
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