•
•
No-flow Detection
Detection
timer
Low Power
No-flow
detection
Warning
Alarm
External
sleep mode
command
Min run
timer
Min sleep
timer
Sleep
mode
Cascade
controller
(destaging
command)
speed detection
Sleep mode
Off
No flow/low
e3
0b
e8
41
.1
0
P 22-24
1
P 22-40
P 22-41
P 25-26
P 22-23
Illustration 18: 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 the drive or an external PI controller. Program the actual configuration in
parameter 1-00
Configuration Mode
.
Configuration mode for
Integrated PI controller: Closed loop.
External PI controller: Open loop.
N O T I C E
Carry out no-flow tuning before setting the PI controller parameters.
Table 384: No-flow Detection
FC
e3
0b
a2
53
.1
0
P
e3
0b
a2
54
.1
0
Head
Flow
2
1
No-flow detection is based on the measurement of speed and power. For a certain speed, the drive calculates the power at no-flow.
AU363928304090en-000101 / 130R0982
166 | Danfoss A/S © 2021.07
Parameters
VLT® Flow Drive FC 111
Programming Guide