28
10.7.1
Primary controller (4.1)
Fig. 26
Primary controller
Description
In this menu section it is possible to set the functions related to
the primary controller.
It is only necessary to make setting in this menu if the
functionality is to be expanded with for instance alternative
setpoints, setpoint influence or redundant primary sensor.
The following menus can be selected:
•
PI controller
•
Setpoints
•
Setpoint influence
•
Primary sensor
•
Redundant primary sensor.
10.7.2 PI controller (4.1.1)
Fig. 27
PI controller
Description
Hydro MPC includes a standard PI controller which ensures that
the pressure is stable and corresponds to the setpoint.
It is possible to adjust the PI controller if a faster or slower
reaction to changes of consumption is required.
A faster reaction is obtained if K
p
is increased and T
i
is reduced.
A slower reaction is obtained if K
p
is reduced and T
i
is increased.
Setting range
•
Gain K
p
: –20 to 20.
Note:
For inverse control, set Kp to a negative value.
•
Integral time T
i
: 0.1 to 3600 seconds.
Setting via control panel
1. Mark the
Settings
menu with
.
2. Mark
Primary controller
with
or
and press
.
3. Mark
PI controller
with
or
and press
.
4. Select the gain (K
p
) with
or
. Set the value with
or
and save with
.
Note:
Usually it is not necessary to adjust K
p
.
5. Select the integral time (T
i
) with
or
. Set the time with
or
and press
.
Factory setting
•
K
p
: 0.5
•
T
i
: 1 second
10.7.3 Selection of alternative setpoints (4.1.2)
Fig. 28
Selection of alternative setpoints
Description
This function makes it possible to select up to six setpoints (no. 2
to 7) as alternatives to the primary setpoint (no. 1). The primary
setpoint (no. 1) is set in display 2 in the
Operation
menu.
Every alternative setpoint can be addressed manually to a
separate digital input (DI). When the contact of the input is
closed, the alternative setpoint applies.
If more than one alternative setpoint has been selected, and they
are activated at the same time, the CU 351 selects the setpoint
with the lowest number.
Setting range
•
Six setpoints, no. 2 to 7.
Factory setting
No alternative setpoints have been selected.
10.7.4 Setting of alternative setpoints 2 to 7 (4.1.2.1 to
T
M
03
23
68
40
05
TM
03
23
87
40
05
T
M
03
2
3
83
40
05
www.motralec.com / [email protected] / 01.39.97.65.10
