Parameters 22-** Application Functions - Danfoss VLT AQUA Drive FC 202 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 3.54 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 2 signals must be active for a set time
(parameter 22-24 No-Flow Delay) before selected action
takes place. Possible actions to select (parameter 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
parameter 1-00 Configuration Mode.
Configuration mode for
•
Integrated PI Controller: Closed Loop
•
External PI Controller: Open Loop
150
Programming Guide
P 22-21
1
Detection
timer
P 22-22
P 22-24
Danfoss A/S © Rev. 2014-01-21 All rights reserved.
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* Digital Inputs 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
External
sleep mode
command
1
O
Warning
Alarm
P 22-23
Sleep
Min run
mode
timer
Min sleep
timer
P 22-40
P 22-41
Cascade
controller
(destaging
command)
P 25-26
MG20O702