User manual

136 • vacon parameter descriptions
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9
9.14 PID control parameters (Control panel: Menu PAR -> P15)
15.5 FEEDBACK VALUE MINIMUM 
15.6 FEEDBACK VALUE MAXIMUM
This parameter sets the minimum and maximum scaling points for feedback
value.
0V
0
mA
par. 15.5
Custom min
par. 6.2
/
6.6
Custommax
par. 15.6
10V
20mA
Analogue input
Controller

feedback (%)
with custom
min and max
scaling (%)
par.6.3/6.7
Figure 9.24: Feedback minimum and maximum
15.7 P GAIN
This parameter defines the gain of the PID controller. If the value of the pa-
rameter is set to 100%, a change of 10% in the error value causes the control-
ler output to change by 10%.
15.8 PID CONTROLLER I-TIME
This parameter defines the integration time of the PID controller. If this pa-
rameter is set to 1,00 second, the controller output is changed by a value cor-
responding to the output caused from the gain every second. (Gain*Error)/s.
15.9 PID CONTROLLER D-TIME
This parameter defines the derivative time of the PID controller. If this param-
eter is set to 1,00 second, a change of 10% in the error value causes the con-
troller output to change by 10%.