User`s manual

228 • Vacon apfiff09 marine
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6
7.17 PI Control
PI Control in system interface application uses ID number to make connection between reference,
actual value and output. PIC function will be active when PIC Controller Output ID is higher than
zero.
PID Controller
OUTGain
Integration Time
Setpoint
Feedback
P PID-Control Gain
P PID-Contol I Time
V PID Output
IN
MUL
DIV
OUT
Scale
V PID Out Scaled
P PID Out Scale
C 100,0 %
ID OUT
ID SEL IN
IN
ID
ID SEL OUT
P PID Reference ID
P PID Actual ID
ID OUT
ID SEL IN
P PID Reference (ID167)
V PID Reference
V PID Actual
PI Out Low
PI Out High
PI Scale
P PID Out ID
P PID Scale
P PID Min Limit
P PID Max Limit
Data
SET
P PID Stop Value
DI PID Activation
P2.17.1 PI Controller Gain ID118 -
This parameter defines the gain of the PID controller. If the value of the parameter is set
to 100% a change of 10% in the error value causes the controller output to change by
10%. If the parameter value is set to 0 the PID controller operates as I-controller.
P2.17.2 PI Controller I time ID119 -Contr
The parameter ID119 defines the integration time of the PID controller. If this parameter
is set to 1,00 second a change of 10% in the error value causes the controller output to
change by 10.00%/s. If the parameter value is set to 0.00 s the PID controller will operate
as P controller.
P2.17.3 PI Controller reference ID167
PI controller reference from keypad, used also when reference is controlled from
Fieldbus.
P2.17.4 PI Controller reference value ID number ID332
Select ID number of the signal that is used as reference valued for PI controller. Default
value is the ID of P2.17.3
P2.17.5 PI Controller actual value ID number ID333
Select ID number of the signal that is used as actual value for PI controller.
PI Actual value can be written from Fieldbus directly to monitoring variable ID21 when
this parameters is set to zero.
P2.17.6 PI Controller output ID ID1802
Select ID number of parameter of signal that is controlled by PI controller. When this
value is creater than zero PI function is operational. This is scaled value by PI Controller
Output Scale. Scaling function is used to scale value more suitable for connected signal.
e.g. when output is connected to torque limit actual value need to be -1000 ...+1000
(-100,0 %..+100,0 %). But PI Out High and Low can be from -30000...+30000 to have
more accurate PI control.