Danfoss VLT AQUA Drive FC 202 Design Manual

Parameter and
Name
Description Settings Unit
Parameter 29-4
0 Pre/Post Lube
Function
Select the pre/post
lube function. Use
parameter 1-71 Start
Delay to set the
delay before the
motor starts ramping.
[0]*Disabled
[1] Pre lube only
[2] Pre & running
[3] Pre & running
& post
–
Parameter 29-4
1 Pre Lube Time
Enter the duration of
the signal after the
start signal. Used
only when [1] Pre
lube Only is selected
in
parameter 29-40 Pre/
Post Lube Function.
0–600 (*10) s
Parameter 29-4
2 Post Lube
Time
Select the duration of
the signal after the
motor has stopped.
Used only when [3]
Pre & running & post
is selected in
parameter 29-40 Pre/
Post Lube Function.
0–600 (*10) s
Table 5.1 Pre/Post Lube Parameters
5.8
Flow Conrmation Overview
The ow conrmation feature is designed for applications
where there is a need for the motor/pump to run while
waiting for an external event. The ow conrmation
monitor expects to receive a digital input from a sensor on
a gate valve, ow switch, or a similar external device,
indicating that the device is in the open position and ow
is possible. In parameter 29-50 Validation Time, dene for
how long the VLT
®
AQUA Drive FC 202 waits for the digital
input signal from the external device to conrm the ow.
After the ow is conrmed, the drive checks the signal
again after the ow verication time and then runs
normally. The LCP status reads Verifying ow while the ow
monitor is active.
If the expected digital input signal becomes inactive before
either the ow validation time or the ow verication time
expires, the drive trips with the alarm alarm 92, No ow.
130BD766.10
N
MAX
N
MIN
0
0
1
1
0
1
0
1
2
3
4
t0 <t1 t2
T
T
T
T
1 Speed curve.
2 Start command (for example, terminal 18).
3 Digital signal from an external device that conrms that
the ow is possible.
4 Flow verication.
t
0
Start command issued (for example, terminal 18 is set
active).
t
1
Digital signal from an external device becomes active
before parameter 29-50 Validation Time expires.
t
2
When parameter 29-51 Verication Time passes, the drive
checks the signal from the external device again and
then runs normally.
Figure 5.14 Flow Conrmation
Parameter and
name
Description Settings Unit
Parameter 29-5
0 Validation
Time
The digital input
must be active
during the
validation time.
0.1–999.0
(*size dependent)
s
Parameter 29-5
1 Verication
Time
Flow will be
conrmed if, at the
end of the veri-
cation time, the
digital input is still
active.
0.1–255.0
(*15)
s
Table 5.2 Flow Conrmation Parameters
NOTICE!
The parameters are only visible on the LCP when a
digital input is congured as ow conrmation.
Product Features Design Guide
MG22B222 Danfoss A/S © 01/2018 All rights reserved. 31
5 5

Danfoss VLT AQUA Drive FC 202 Specifications

General

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