Basler DECS-200 User Manual

5-34 BESTCOMS Software DECS-200
Field Input Data, Generator Time Constant T’do. The time constant of the generator is entered in this
field. The generator time constant and exciter time constant are used to calculate gain parameters Kp, Ki,
and Kd. A setting of 1 to 15 may be selected from the pull-down menu.
Field Input Data, Exciter Time Constant Texc. The time constant of the exciter is entered in this field. The
exciter time constant and generator time constant are used to calculate gain parameters Kp, Ki, and Kd.
The exciter time constant setting range varies according to the generator time constant value selected.
The default value for the exciter time constant is the generator time constant divided by six.
Field Output Data, Gain Kp. This read-only field displays the calculated value of Kp based on the
generator time constant (T’do) and exciter time constant (Texc).
Field Output Data, Gain Ki. This read-only field displays the calculated value of Ki based on the generator
time constant (T’do) and exciter time constant (Te).
Field Output Data, Gain Kd. This read-only field displays the calculated value of Kd based on the
generator time constant (T’do) and exciter time constant (Texc).
Figure 5-36. PID Window
Field Output Data – Gain Kg.
This read-only field displays the calculated value of Kg based on the
generator time constant (T’do) and exciter time constant (Texc).
Buttons below the Field Output Data fields enable existing PID records to be deleted (Remove Record),
enable calculated setting to be saved in a record (Add to PID List), enable a set of PID parameters to be
retrieved from the PID list and invoked, and update the PID settings displayed in the PID window and
used by the DECS-200N (Update Setting Screen). Clicking the Close button exits the PID window and
returns to the Control Gain screen.
PID List. This area of the PID window displays the groups of available PID settings.
PID Calculations Based On Input Values
The available exciter time constant range is determined by the generator time constant input value. (The
default value for the exciter time constant is the generator time constant divided by six (T’do ÷ 6).) The
generator time constant input value must be in the range of 1.0 to 15.0 seconds and in 0.05 second
increments. When the generator time constant value is 1.00, the available exciter time constant range is
0.03 to 0.50 in 0.01 second increments. When the generator time constant value is 15.00, the available
exciter time constant range is 0.30 to 3.00 in 0.01 second increments.
For example, when you set T’do = 2.0 seconds, Texc is 0.33. After specifying the input values, a set of
PID parameters (Output Data) is generated automatically. If you set T’do = 5.00 seconds, then Texc will
be 0.83 seconds. The calculated KP is 155.47, KI is 138.72, KD is 48, and Kg is 1.
PID parameters can be directly removed from, added to, or modified in the PID List Data. PID parameters
may also be saved into a file (pidlist.dat).

Basler DECS-200 Specifications

General

Brand	Basler
Model	DECS-200
Category	Controller
Language	English