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Lauda IN 130 T User Manual

Lauda IN 130 T
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In the case shown here, the preset I component is too large (parameter
Tn too small, Tn must be increased). The I-component integrates the
control deviation until it becomes 0. If integration proceeds too rapidly,
the actuating signal, i.e. the output signal of the controller, is too large.
As a result, the actual value fluctuates (fading) around the target value.
The hold-back time (parameter Tv) should be adapted using the formula:
Tv = Tn x 0.75 adapted.
The actual value increases relatively sharply towards the specified target
value. The proportional area settings seem to be correct. If the control devi-
ation becomes smaller, the actual value approaches the target value much
more slowly. The integration component (I-component) must compensate
for the drastic reduction of the proportional component (P-component). In
this case, the I component is integrated too slowly. The parameter Tn, which
specifies the integration interval, must therefore be reduced. The hold-back
time (parameter Tv) should be adapted using the formula: Tv = Tn x 0.75.
5.8.2 Overview of internal control parameters
The internal control compares the set temperature with the outflow tem-
perature and calculates the actuating signal, i.e. the measurement used for
heating or cooling.
Table 32: The following control parameters can be adapted for internal
control:
Characteristics Designation Unit
Xp Proportional range K
Tn Adjustment time s
Tv Hold-back time s
Td Attenuation time 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 temperature limits Tih and Til also have an eect on the
control.
Fig. 42: Control parameters Tn and Tv too
small
Fig. 43: Control parameters Tn and Tv too
large
V6Integral Process Thermostats and High-Temperature Thermostats82 / 198

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Lauda IN 130 T Specifications

General IconGeneral
BrandLauda
ModelIN 130 T
CategoryThermostat
LanguageEnglish

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