KFU 2-/4-
111
10 System
Data
The various control functions and methods according to the selected
Configuration
30
are supplemented by control and special functions. For monitoring the application,
process parameters are calculated from electrical control parameters.
10.1
Actual System Value
The parameter
Actual system value factor
389
can be used if the drive is monitored
via the actual value
Actual system value
242
.
The
Actual frequency
241
to be monitored is multiplied by the
Actual system value
factor
389
and can be read out via the parameter
Actual system value
242
, i.e.
Ac-
tual frequency
241
x
Actual system value factor
389
=
Actual system value
242
.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
389 Factor Actual Value System
-100.000
100.000
1.000
10.2
Volume Flow and Pressure
The parameterization of the factors
Nominal Volumetric Flow
397
and
Nominal Pres-
sure
398
is necessary if the matching actual values
Volumetric Flow
285
and
Pres-
sure
286
are used to monitor the drive. The conversion is done using the electrical
control parameters.
Volume flow
285
and
Pressure
286
are referred to the
Effective current
214
in the
case of the sensorless control methods. In the case of the field-oriented control me-
thods, they are referred to the torque-forming current component
Isq
216
.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
397 Nominal volumetric flow
1 m
3
/h 99999
m
3
/h 10
m
3
/h
398
Nominal
pressure
0.1 kPa
999.9 kPa
100.0 kPa
Line mains or channel characteristic:
H
kPa
Q
m /h
3
bad point method
P
- method
const.
A
B2
B1
Point A in the figure describes the rating point of a pump. The transition to partial load
operation mode B1 can be affected at a constant pressure H (change of conveying
flow Q, pressure H remains constant). The transition to partial load operation mode
B2 can be affected according to the bad point method (change of pressure H and
conveying flow Q). Both methods can be realized with the integrated technology con-
troller in configurations 111 and 211. The actual values displayed are calculated ac-
cording to the bad point method independently of the selected
Operation mode
440
of the technology controller.
