Controller operating manual
15.11.2020 – Version 1.1
TCS.2 series –
thermofin
®
control system 2
nd
generation
Page: 100/162
Operating manual - translation into English © thermofin GmbH
simple and sufficiently precise procedure which enables the specialist to determine the parameters
for a properly functioning control system during operation.
In order to determine the parameter values, the user must proceed in a concentrated and slow
manner. It should be constantly observed whether the changes made improve or worsen the control
process.
If improvements have been made, the values can be further adjusted in small steps in the same
direction. Always slowly and with constant observation of the system. If the control process
deteriorates, the last step is reversed and the values changed in the opposite direction.
Steps to adjust the Kp:
To simplify the adjustment, the reset time “Tn” is switched off by setting it to the value “0”.
For two-circuit devices, set both “Kp values” to be the same. Now both controllers work as pure
P-controllers with the same parameters.
Increase the or both “Kp values” until the system becomes unstable and tends to oscillate.
Once this value has been determined, the “Kp values” are reduced a little so that the controlled
system works stably. This is the optimal (adapted) proportional factor for the system.
After determining and setting the proportional factor, the reset time “Tn” is determined.
Steps to adjust the Tn:
Switch off the cooling system.
Set the value “Tn” to approx. 60 seconds.
Switch on the cooling system again after a few minutes and observe the behaviour of the
controller or the fans.
If the pressure or temperature rises faster than the controller starts up the fans, “Tn” is too high.
Reduce this value accordingly.
If the fans start up faster than the pressure or the temperature in the system increases, “Tn” is
too small. The value must be increased.
In perfect case scenario, the speed of the control behaviour corresponds exactly to the speed at
which the pressure or temperature changes. With a controller adapted in this way to its controlled
system, system vibrations are excluded and the fastest possible reaction to changes in the cooling
system is achieved. The controller works with the smallest system deviation now and thus ensures
optimal system operation.
Additional functions
In contrast to the standard, there are various functions and setting levels that are listed in this
submenu item. All functions that are not activated in the device settings are greyed out with a white
background.
