9.9.7
Reverse action of the control function
Controller Setup
For the effect of the regulation there are two functions:
•
ON
for
“
Val>Set=n+
”
increasing Fanlevel for increasing actual value over
Setpoint.
•
OFF
for
“
Val>Set=n+
”
increasing Fanlevel for decreasing actual value below
Setpoint.
Display for operation with two control circuits:
“
1. Actual>Set=n
”
for control circuit 1
“
2. Actual>Set=n
”
for control circuit 2
For special applications an external switch over of the control function is possible (
IO Setup).
ON
Val>Set=n+
Factory setting depending
on selected mode
Example for temperature control (Idealized principle diagram)
Mode
Controller
function
nM
100 %
I
S
R
R
OFF
ON
10.05.2007
v_umkehr_regelfunktion.vsd
nM
Motor speed
R
Pband
S
Setpoint
I
Actual value
OFF
for Val > Set = n+ = heating function
ON for Val > Set = n+ = cooling function
1.01
non
2.01
...
ON
3.01
...
ON
4.01
...
OFF
5.01
...
OFF
6.01
...
OFF
9.9.8
Controller con
fi
guration
The
“
controller con
fi
guration
”
is automatically carried out during selection of the application related
mode of operation (Base setup). The factory presets in accordance with the mode of operation are
based on many years of experience, which is suitable for many applications. Under special circum-
stances, these can be individually adapted (
Menu group
“
setting
”
).
Controller Setup
The type of control determines the method with which the controlled value behaves in
case of a difference between the target and current values. For this, the control
technology has standard algorithms, which consist of a combination of three methods:
Selection P, PID:
•
P
control (Proportional component, proportion of the absolute deviation)
•
I
control (Integral component, proportion of the sum of all deviations)
•
D
control (Differential component, proportion of the last difference)
Display for operation with two control circuits:
“
1.Controller type
”
for control circuit 1
“
2.Controller type
”
for control circuit 2
P
Type of control
With pure P controllers (controller type
P
), the following described settings do not have any function.
If needed, the most suitable combination for the respective control system can be determined from these
proportions.
The control con
fi
guration (KP, KI, KD, TI) is identical for both control circuits in operation with two control circuits.
Fine adjustment is possible for each control circuit by the separate
“
Pband
”
setting.
Controller Setup
P-component = reaction time
Setting range: 0 - 200 %
smaller = more slowly
bigger = faster
50 %
KP
Operating Instructions
Fcontrol
–
model series FXDM25/32AM
Programming
L-BAL-E212-GB 1451 Index 003
Part.-No.
59/123
