Proline Edition X heating thermostats
YACE0099 / 10/9/2018
75
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 (
Sec-
tion 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 tem-
perature setpoint and the external 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 tempera-
ture, which might significantly exceed the temperature desired on the external vessel. There is a correc-
tion limitation, which specifies the maximum permissible deviation between the temperature on the ex-
ternal 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 ex-
ternal 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
Ma
ster 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
Sl
ave controller (P-controller):
Sl proportional range:
iP
= Xpf
in Kelvin.
Tve, Tde, Prop_E changeover to Auto/ Man
E
A
= Automat-
ic 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 Edition X P 12 C
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