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Proline heating thermostat
7.13.2
External control variable (External measurement probe)
You only need to read further here if you have connected an external temperature probe or the actual temperature is
read in from a module (and you have activated it as control variable according to (
Section 7.7.4)).
Only modify the control parameters if you have knowledge of control techniques.
The control system for external actual values is implemented for improvement of the control behavior as a two-stage
cascade controller. A "master controller" determines the "internal setpoint", from the temperature setpoint and the ex-
ternal temperature, passed to the slave controller. The control value of the slave controller controls the heating.
When a setpoint step change is specified, it may be that the optimum control would set a bath temperature, which
might significantly exceed the temperature desired on the external vessel. There is a correction limitation, which speci-
fies the maximum permissible deviation between the temperature on the external load and the bath temperature.
Master
P1d..
3x
to
MNEnu
1x
to
P1d..
As shown in the menu structure (
7.6), the parameters for the external
control variable can now be set.
Select the parameter with or and confirm with . The set value is
displayed. Adapt it with or confirm with .
Example: Proportional factor of the master controller Kpe = 1.5.
Parameters Master controller (PIDT
1
-controller):
Ma proportional factor:
EP
= Kpe
as factor.
Ma proportional range:
Eb
= Prop_E in Kelvin.
Ma reset time:
En
= Tne
in seconds.
Ma derivative time (auto/ man)
Ev
= Tve
in seconds.
The thermostat logic system only permits values with Tne > Tve!
Ma damping time (auto/ man)
Ed
= Tde
in seconds.
Parameter Slave controller (P-controller):
Sl proportional range:
iP
= Xpf
in Kelvin.
Tve, Tde, Prop_E changeover to Auto/ Man
E
A
= Automatic or
MN
=
Manual.
Works setting is Automatic. These three parameters should only be modified
by experienced control technicians!
Hold pressed for 3s, then make changes.
Correction limitation
Et0l
. See introduction (
EP !5
°C
Et0l
°C
E A
°C
Summary of Contents for PROLINE P 5 C
Page 13: ...02 2022 Proline heating thermostat 13 123 Clear view thermostat PVL 24 Bridge thermostat PB C ...
Page 113: ...02 2022 Proline heating thermostat 113 123 Pump characteristics measured with water ...
Page 114: ...114 123 Proline heating thermostat 02 2022 Pump characteristics measured with water ...
Page 115: ...02 2022 Proline heating thermostat 115 123 12 Declaration of Conformity ...
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