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
3 3
This group contains parameters used for monitoring water/
wastewater applications.
3.19.2 22-2* No-Flow Detection
No ow/low
speed detection
Low Power
detected
Low speed
detected
Illustration 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. Actual config-
uration must be programmed in 1-00 Configuration Mode.
Configuration mode for
- Integrated PI Controller: Closed Loop
- External PI Controller: Open Loop
CAUTION
Carry out No Flow tuning before setting the PI controller
parameters!
142
VLT
P 22-21
1
Detection
timer
P 22-22
P 22-24
MG20O602 - VLT
®
AQUA Drive Programming Guide
22-00 External Interlock Delay
Range:
0 s [0 - 600
*
s]
External
sleep mode
command
O
Warning
Alarm
P 22-23
Illustration 3.49
®
is a registered Danfoss trademark
Function:
Only relevant if one of the digital inputs in
parameter group 5-1* has been programmed for
[7] External Interlock. 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.
Sleep mode
Sleep
Min run
mode
timer
1
Min sleep
timer
P 22-40
P 22-41
Cascade
controller
(destaging
command)
P 25-26
FC
P