Lauda P 10 - Overview of External Control Parameters

Designation Abbreviation Unit
Proportional range Xp K
Adjustment time Tn s
Hold-back time Tv s
Attenuation time Td s
If Tv manual/auto is set to auto , Tv and Td cannot be modified. In
this case, they are derived with fixed factors of Tn.
The following parameters may also influence the internal control:
 Temperature limits: Til and Tih Ä Chapter 5.9 “Setting temperature
limits Tih and Til” on page 73
 Controller output limit: Heating power and cooling capacity Ä Chapter
6.5 “Defining the actuating signal limit” on page 89
6.8.3 Overview of external control parameters
The control system for the external actual value is designed as a 2-stage
cascade controller to improve guidance behavior and consists of a guide
controller (external controller) and a slave controller (internal controller).
The temperature of the relevant consuming unit T
ext
is also required. This
temperature is measured using an external Pt100 temperature probe or an
interface for importing the actual temperature.
The guide controller compares the set temperature T
set
with the external
temperature in the consuming unit T
ext
and uses these temperatures to
calculate the set temperature (set_internal) for the slave controller (internal
controller).
The slave controller compares the set temperature (set_internal) with the
outlet temperature and calculates the actuating signal, i.e. the measurement
used for heating or cooling.
If set temperature T
set
indicates a temperature jump, the control may set an
outlet temperature much higher than the temperature T
ext
required in the
external container. Therefore, there is a correction limitation that specifies
the maximum permitted deviation between the temperature at the output
T
int
and the temperature in the external consuming unit T
ext
.
The following control parameters can be set on the guide controller (PID
1
controller or external controller).
Designation Abbreviation Unit
Amplification factor Kpe -
Proportional range Prop_E K
Adjustment time Tne s
Correction limitation
Control parameters on the guide controller
V6PRO bath thermostats and circulation thermostats100 / 156