External Control Variable (External Measurement Probe) - Lauda PROLINE P 5 C Operating Instructions Manual

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
3x to
MNEnu
1x to
P1d..
EP !5
E
Et0l
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P1d..
 As shown in the menu structure ( 7.6), the parameters for the external
control variable can now be set.
 Select the parameter with
displayed. Adapt it with
 Example: Proportional factor of the master controller Kpe = 1.5.
Parameters Master controller (PIDT
 Ma proportional factor:
°C
 Ma proportional range:
 Ma reset time:
 Ma derivative time (auto/ man)
The thermostat logic system only permits values with Tne > Tve!
 Ma damping time (auto/ man)
Parameter Slave controller (P-controller):
 Sl proportional range:
 Tve, Tde, Prop_E changeover to Auto/ Man E
Manual.
°C
A
Works setting is Automatic. These three parameters should only be modified
by experienced control technicians!
Hold
 Correction limitation Et0l . See introduction ( 7.13.2).
°C
Proline heating thermostat
or
or confirm with
-controller):
1
pressed for 3s, then make changes.
and confirm with . The set value is
.
= Kpe as factor.
EP
= Prop_E in Kelvin.
Eb
= Tne in seconds.
En
= Tve in seconds.
Ev
= Tde in seconds.
Ed
= Xpf in Kelvin.
iP
A = Automatic or MN =
02/2022