Overview Of External Control Parameters - Lauda P 10 Operation Manual

6.8.3 Overview of external control parameters

Correction limitation
Control parameters on the guide controller
100 / 156
Designation
Proportional range
Adjustment time
Hold-back time
Attenuation time
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
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
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
temperature in the consuming unit T
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
outlet temperature much higher than the temperature T
external container. Therefore, there is a correction limitation that specifies
the maximum permitted deviation between the temperature at the output
T and the temperature in the external consuming unit T
int
The following control parameters can be set on the guide controller (PID
controller or external controller).
Designation
Amplification factor
Proportional range
Adjustment time
PRO bath thermostats and circulation thermostats
Abbreviation
Xp
Tn
Tv
Td
and uses these temperatures to
ext
indicates a temperature jump, the control may set an
set
Abbreviation
Kpe
Prop_E
Tne
Unit
K
s
s
s
is also required. This
ext
with the external
set
required in the
ext
.
ext
1
Unit
-
K
s
V6