HPS-C - TS operating instructions
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Load type / control parameters
The HPS-C control system is equipped with a PID control algorithm, which ensures optimum control performance and small
deviations between the actual and set value during operation. During the system's heating phase other additional supporting
special functions act (ramp, compound operation ...), as the connected controlled system (hotrunner) mostly behaves
differently to the subsequent operation.
The controller usually determines the load type
for each zone itself (see chapter: "Options - Load type recognition"), and
depends on the type of heating connected. In total, they are divided into 10 different types, for which respective specific
controller default systems are stored in the system. The following table gives typical values for the various settings, however
may contain different values in the controller:
Load type
Hotrunner type
P (amplification)
I (Reset time) / s
D (Rate time) / s
1 (230V)
230V, very sluggish performance
25.00
150.0
0.5
2 (230V)
230V, sluggish performance
20.00
120.0
0.4
3 (230V)
230V, average performance 15.00
90.0
0.3
4 (230V)
230V, fast performance 10.00
60.0
0.2
5 (230V)
230V, very fast performance
5.00
30.0
0.1
1 (5V)
5V, very sluggish performance
0.80
15.0
6.4
2 (5V)
5V, sluggish performance 0.80
15.0
6.4
3 (5V)
5V, medium performance
0.80
15.0
6.4
4 (5V)
5V, fast performance
0.80
15.0
6.4
5 (5V)
5V, very fast performance
0.80
15.0
6.4
If required the control characteristics can also be adjusted manually, if good control results are not achieved with the
automatic recognition. Either the load type can be changed, whereby the settings stored in the system are automatically
adopted. Optionally, the 3 control parameters can also be individually adjusted.
Proportional component P (amplification):
The amplification determines size of the set power depending on the control difference. Higher values mean a higher output
with the same deviation; lower values correspond to a smaller output. The proportional component mainly acts during the
start-up of new set values (large control deviation) and faults during operation, and corrects deviations as quickly as
possible.
Integral component I (reset time):
The reset time depends on the connected heaters and the speed with which the temperature can follow the changes in
output power. Sluggish heaters require a larger reset time, fast nozzles a correspondingly smaller time frame. The integral
component keeps the control circuit at the required set temperature via a summed (integral) output power, if there are no
longer any control deviations (control offsets).
Differential component D (rate time):
The rate time (derivative action time) counteracts changes and depends on how fast the actual value of the connected
heaters changes within a specific unit of time. A more or less large attenuation must be set depending on the speed of the
actual value change, in order to avoid control circuit oscillation. The differential component mainly acts in the event of fast
changes, e.g. cycle-induced faults due to frictional heat input, and determines (differentiates) its output power from the
change per unit of time.
The total output power for the control circuit is calculated from the three single components P, I and D.
IMPORTANT: The following points must be noted in case of manual intervention in the controls:
-
The values should be changed individually and in small steps in order to enable differentiated
evaluation of the results. After each change the controller requires a certain amount of time
(approx 5 – 10 minutes) to adapt to the new settings.
-
Manual settings are only permanently retained if load type recognition is switched off in the
"Options" menu. If not the controller default setting is loaded each time the hotrunner system is
switched on again.
