Parameters 22-** Application Functions - Danfoss VLT AQUA Drive FC 200 Programming Manual

Parameter Description
3.19 Parameters 22-** Application
Functions
3.19.1 22-0* Miscellaneous
This group contains parameters used for monitoring water/waste water applications.
22-00 External Interlock Delay
Range: Function:
0 s [0 - 600 Only relevant if one of the digital inputs in
*
s] parameter group 5-1* has been programmed for
[7] External Interlock. The external interlock timer
3.19.2 22-2* No-Flow Detection
Figure 3.48 Signal Flow Chart
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 (22-24 No-Flow Delay) before selected action takes place. Possible
actions to select (22-23 No-Flow Function): 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. The actual configuration
must be programmed in 1-00 Configuration Mode.
Configuration mode for
- Integrated PI Controller: Closed-loop
- External PI Controller: Open-loop
®
VLT AQUA Drive Programming Guide
®
MG20O622 - VLT is a registered Danfoss trademark
22-00 External Interlock Delay
Range: Function:
will introduce a delay after the signal has been
removed from the digital input programmed for
External Interlock, before a reaction takes place.
3 3
3-123