WEG CFW08 Vector inverter User Manual page 110

[Factory Setting]
Parameter
P520
PID Proportional
Gain
P521
PID Integral
Gain
P522
PID Differential
Gain
P525
The PID Setpoint
P526
Process Variable
Filter
P527
PID Action
P528
Process Variable
Scale Factor
P536
Automatic Setting
of P525
Range
Unit Description / Notes
The integral gain can be defined as being the time required to change
0.000...7.999
the PI regulator output from 0 to P134, that is given, in seconds, by
[ 1.000 ]
the equation below:
0.001
0.000...9.999
[ 1.000 ]
0.001
for the following conditions:
-
0.000...9.999
-
[ 0.000 ]
0.001
Provides the setpoint (reference) of the process via cointrol via the
0.00...100.0%
[ 0.00 ]
0.01%
(local) or P222=0 (remote) has been set to automatic mode. If it
has been set to Manual Mode, the frequency reference is given by
P121.
If P120=1 (backup active), the value of P525 is maintained at the
last set value (backup), even when the inverter is disabled or tuned
off.
0.00...10.00s It sets the time constant of the Process Variable Filter.
[ 0.10s ] It is useful for noise filtering at the analog input AI1
(feedback of the process variable).
0.01s
0...1
Defines the action type of the PID regulator.
[ 0 ]
-
Select it according to the table below:
0.00...99.9
Defines the process variables scale. It makes the conversion between
[ 1.00 ]
percentage value (used internally by the inverter) and the process
0.01(<10);
variable unit.
0.1 (>9.99)
P528 defines how the process variable at P040 will be shown:
P040=value % x P528.
Set P528 to:
0...1
It is posible to enable/disable the copy of P040 (PID process variable)
[ 0 ]
in P525 when the changing from manual to automatic mode using
-
parameter P536, that is described below.
DETAILED PARAMETER DESCRIPTION
t =
P521 . P525
P040=P520=0;
DI3 in automatic position.
and keys for the PID regulator, provided that P221=0
P527
0
1
Process For this the
variable motor speed
requirement
Increase Increase
Decrease Increase
P528 =
P536
0 Active (copies the value of P040 in P525)
1 Inactive (does not copies the value of P040 in P525)
16
Action Type
Direct
Reverse
P527 to be
used
must
0 (Direct)
1 (Reverse)
full scale of the used sensor (FM)
P234
Function
109