Parameter description
vacon • 74
Service support: find your nearest Vacon service center at www.vacon.com
4
4.12
PID Control
Parameters of this group are hidden unless the regulator is used as frequency reference
(P1.12= or P2.15=2)
P12.1 S
ETPOINT
SOURCE
0: PID setpoint 1-2
1: analogue AI1
2: analogue AI2
3: fieldbus
P12.2 PID
S
ETPOINT
1
P12.3 PID
S
ETPOINT
2
Programmable setpoints. Setpoint 2 is activated with digital input defined in P4.16.
P12.4 F
EEDBACK
SOURCE
0: analogue AI2
1: analogue AI1
2: fieldbus
3: AI2-AI1 (differential)
4: temperature (only with board OPTBH, see P13.8-10)
P12.5 F
EEDBACK
MINIMUM
P12.6 F
EEDBACK
MAXIMUM
Minimum and maximum feedback values, corresponding to minimum and maximum of the
signal.
P12.7 PID
CONTROLLER
P
GAIN
Proportional gain. If set to 100%, a variation of 10% on error causes a variation of 10% on reg-
ulator output.
P12.8 PID
CONTROLLER
I-
TIME
Integral time constant. If set to 1s, a variation of 10% on error will cause a variation of 10% on
regulator output after 1s.
P12.9 PID
CONTROLLER
D-
TIME
Derivative time. If set to 1s, a variation of 10% in 1s on error causes a variation of 10% on reg-
ulator output.
P12.10 E
RROR
VALUE
INVERSION
0: direct control. Frequency increases if setpoint > feedback
1: inverted control. Frequency increases if setpoint < feedback
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