VCS – Viscosity Controller
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P = proportional band Xp (%):
Lower value = longer impulses (three-point step control), more sensitive reaction,
Higher value = shorter impulses (three-point step control), less sensitive reaction.
Examples:
Oscillating temperature/viscosity without distinct initial overshoot:
P (Xp) too low
Setpoint is reached very slowly after initial overshooting:
P (Xp) to high
I = Integral action time Tn (min):
Lower value = shorter impulse gaps (three-point step control), faster balancing
Higher value = longer impulse gaps (three-point step control), slower balancing
Examples:
the set value is reached very slowly without overshooting:
I (Tn) too high
high initial overshot followed by fading oscillation:
I (Tn) to low
D = rate time Tv (min):
Increases the controller reaction in case of fast actual or setpoint alterations (adjust only if necessary).
Higher values cause higher increase.
Содержание Viscosity VC312
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