30
7. Mark
Setting of influence function
with
or
and
press .
Factory setting
External setpoint influence is not activated.
10.7.7 Influence function (4.1.3.1.1)
Fig. 32
Setting of influence function
Description
In this menu you select the relation between the measuring
parameter which is to influence the setpoint and the desired
influence as a percentage.
The relation is set by entering values in a table with maximum
eight points by means of the control panel.
Example with four points:
Fig. 33
Relation between setpoint influence and flow rate
The control unit of the Hydro MPC draws straight lines between
the points. A horizontal line is drawn from the minimum value of
the relevant sensor (0 gpm in the example) to the first point. This
is also the case from the last point to the sensor's maximum value
(example 50 gpm).
Setting range
Two to eight points can be selected. Each point contains the
relation between the value of the parameter which is to influence
the setpoint and the influence of the value.
Setting via control panel
1. Mark the
Settings
menu with
.
2. Mark
Primary controller
with
or
and press
.
3. Mark
Setpoint influence
with
or
and press
.
4. Mark
External setpoint influence
with
or
and press
.
5. Mark
Set the influence function
with
or
and press
.
6. Mark the menu line for number of points with
or
and
press .
7. Select the required number of points with
or
and
save with
.
8. Mark
External input value
(point 1) with
or
.
9. Set the value of the external input value with
or
and
save with
.
10.Mark
Reduce setpoint to
(point 1) with
or
.
11.Set the value in per cent with
or
and save with
.
12.Repeat points 5 to 11 for all desired parameters.
Factory setting
External setpoint influence is not activated.
10.7.8 Primary sensor (4.1.4)
Fig. 34
Primary sensor
Description
In this display, select the control parameter of Hydro MPC and the
sensor to measure the value.
Usually the control parameter is the discharge pressure which is
measured by a sensor fitted on the discharge manifold and
connected to analog input AI1 of CU 351.
Alternative control parameters are
•
External pressure
Select this parameter if the pump performance is to be control-
led according to a pressure measured outside the booster set.
•
Flow rate
Select this parameter if Hydro MPC is to deliver a constant
flow rate.
If one of the alternative control parameters is selected, the sensor
must be connected to AI3 (CU 351) which is then set to external
pressure or flow rate as parameter.
Setting range
•
Not used
•
Discharge pressure (factory setting)
•
External pressure
•
Flow rate
From factory the discharge pressure sensor is connected to AI1
(CU 351). If one of the two other parameters is selected, the
sensor in question must be connected to AI3 (CU 351) which is
then set to function as the primary sensor.
Setting via control panel
1. Mark the
Settings
menu with
.
2. Mark
Primary controller
with
or
and press
.
3. Mark
Primary sensor
with
or
and press
.
TM
0
3
2
3
89
4
005
T
M
03
16
91
27
05
20
50
40
60
80
100
Setpoint influence [%]
Q
[gpm]
T
M
03
2
3
73
40
05
www.motralec.com / [email protected] / 01.39.97.65.10
