Danfoss VLT AQUA Drive FC 202 Programming Guide

3.25.6 29-6* Flow Meter
VLT
®
AQUA Drive FC 202 can measure the ow in the
system. Irrigation applications is the most common use
case for parameters in this parameter group. The
functionality allows to:
•
Measure the ow in the system.
•
Calculate the water volume pumped for a period
of time.
•
React on ow conditions (for example, low ow
rate).
•
Control the system using the pumped water
volume calculated by the frequency converter (for
example, stop pumping when a certain amount
of water is pumped, cyclic pumping of water
volumes).
•
Utilize the output signal of an external ow meter
that is connected to an input of the frequency
converter.
Inputs and supported signal types
The ow meter feature can use and scale the output
signals of commonly used ow meters. The feature
supports the following signal types:
•
Current: 0/4–20 mA.
•
Voltage: 0–10 V.
•
Pulse signal (for example: paddle wheel ow
meters).
Congure the scaling of the ow meter signal received as
input via the available parameters for the input congu-
ration (parameters in parameter group 6-** Analog In/Out,
or 5-5* Pulse Input). The ow meter feature also supports
inputs of hardware options.
Volume counters
The ow meter feature uses 2 dierent counters for storing
the calculated volume of pumped water:
•
Parameter 29-66 Actual Volume: See the volume of
water pumped since the last counter reset.
•
Parameter 29-65 Totalized Volume: See the volume
of water pumped since the last counter reset. Use
this parameter for the total volume of water
pumped.
The 2 counters can have dierent units. Use
parameter 29-66 Actual Volume for shorter periods of time.
Each parameter can be reset individually in 1 of the
following ways:
•
Using parameter 29-67 Reset Totalized Volume or
parameter 29-68 Reset Actual Volume.
•
Using a digital input.
•
Using an action of the smart logic controller.
Reading the data
The measured data is available via readout parameters:
•
Parameter 29-65 Totalized Volume.
•
Parameter 29-66 Actual Volume.
•
Parameter 29-69 Flow.
To show the readout parameters on the LCP, congure the
display lines. Comparator operands can use the data from
readout parameters as conditions for SLC, and as triggers
for actions. The measured ow can also be used as input
for the feedback.
NOTICE
This software feature has not been designed as being
part of a calibrated measurement system. The overall
accuracy also depends on external factors such as ow
conditions and used ow meter. See the design guide for
details about analog and digital inputs of the frequency
converter.
Examples
•
A sequence of SLC is triggered (or stopped) after
a specic amount of water is pumped.
•
The frequency converter performs 1 or more
actions and resets the volume counters within a
sequence of SLC.
•
An alert shows up after a specic amount of
water is pumped.
29-60 Flow Meter Monitor
Enable the ow meter monitor.
Option: Function:
[0] * Disabled
[1] Enabled
[2] Enabled While Running Enable the monitor only when the
connected pump is running.
29-61 Flow Meter Source
Select the source for the ow meter signal. Available options
depend on the hardware conguration.
Option: Function:
[0] * Analog Input 53
[1] Analog Input 54
[2] Analog Input X30/11
[3] Analog Input X30/12
[4] Analog Input X42/1
[5] Analog Input X42/3
[6] Analog Input X42/5
[7] Analog Input X48/2
[8] Pulse Input 29
[9] Pulse Input 33
[10] Bus Feedback 1
[11] Bus Feedback 2
[12] Bus Feedback 3
Parameter Description Programming Guide
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Danfoss VLT AQUA Drive FC 202 Specifications

General

Brand	Danfoss
Model	VLT AQUA Drive FC 202
Category	DC Drives
Language	English