installation &
operating instructions
Design Envelope 4302 ivs and 4382 ivs vertical
in-line pumping unit with integrated controls
43
13.2 constant pressure control
ivs Sensorless pumps can be confi gured to maintain a
constant pump head in a system as the demand varies. This
e ectively simulates the mounting of a di erential pressure
sensor at, or near, the pump.
13.2.1 settings for constant
pressure control
To revert to this mode of control simply follow these steps:
1 Set the design head, h
DESIGN
, value in Par. 20-21 (Setpoint 1).
In the units set in Par.20-12 (Reference/Feedback unit.)
2 Turn o fl ow compensation by setting Par. 22-80 to
'Disabled' [0]
13.3 changing control modes
13.3.1 change to external
sensor control
1 Change parameter 0-10 from 1 to 2
2 Connect the sensor to terminals 54 (+) and 55 (-)
3 Move switch s202 (beside terminal input 54) to on if the
speed command is 4-20mA, or leave it o if it’s 0-10Vdc
4 If the sensor signal is neither 0-10Vdc nor 4-20mA, enter
the correct voltage or input range in parameters 6-10
to 6-13
5 Enter the sensor and setpoint data in the parameters
listed below
param. name setup 2 (external sensor)
0-10 Active set-up 2
6-24
Terminal 54 low ref.
/feedback value
Minimum sensor value
6-25
Terminal 54 high
Ref./feedback value
Maximum sensor value
20-02
Feedback 1 source
unit
Unit of external sensor
20-12
Reference/feed-
back unit
Unit of external sensor
20-13
Minimum refer-
ence/feedback
Low limit of sensor
20-14
Maximum refer-
ence/feedback
Upper limit of sensor
20-21 Setpoint 1 Design setpoint
20-93
pid proportional
gain
Needs to be fi ne tuned on
site
Start
at 2
20-94 pid Integral Time
Needs to be fi ne tuned
on site
Start
at 1
22-43
Wake Up Speed
[Hz]
Need to be fi ne tuned
on site
Start at
20
13.3.2 change to open loop (bas)
control
1 Change parameter 0-10 from 1 to 3
2 Connect the bas command on terminals 53 (+) and 55 (-)
3 Move switch s201 (beside terminal input 53) to on if the
speed command is 4-20mA, or leave it o if it’s 0-10Vdc
4 If the reference signal is neither 0-10Vdc nor 4-20mA,
enter the correct voltage or input range in parameters 6-10
to 6-13
5 The maximum speed (at 20mA or 10Vdc) can be adjusted
in parameter 3-03
6 The drive on/o status can be read as a dry contact
between terminals 05 and 06
7 The drive alarm status can be read as a dry contact
between terminals 01 and 02
8 Terminals 42(+) and 39(-) can provide a 0/4-20mA output
which by default is disabled, but can be confi gured to pro-
vide speed feedback or sensorless fl ow
13.3.3 change to sensorless control
1 Change parameter 0-10 to 1
The unit will start controlling based on the pump
design data
2 If the pump operation point needs to be changed, see the
parameters that need to be modifi ed in section 6.1
sensorless
14.0 warnings and alarms
A warning or an alarm is signalled by the relevant led on the
front of the inverter and indicated by a code on the display.
A warning remains active until its cause is no longer present.
Under certain circumstances operation of the pump may still
be contin ued . Warning m ess ag es may b e critic al, bu t are n ot
necessarily so.
In the event of an alarm, the inverter will have tripped.
Alarms must be reset to restart operation once their cause
has been rectifi ed. In many cases the auto reset function
will restart the pump. Alternatively, the Reset button on the
control panel can be pressed.
After a manual reset using the Reset button on the
control panel, the Auto On button must be pressed to
restart the pump.
If an alarm cannot be reset, the reason may be that its cause
has not been rectifi ed, or the alarm is trip-locked (see also
table on following page).
To Next Page
